Alternative to Mailgun
A migration-focused analysis for teams leaving Mailgun after the September 2021 Sinch acquisition and the accumulated drift since. Reported 20-40% price increases since acquisition. GlockApps Q1 2025 data recorded inbox placement falling from 53.8% to 26.05% year-over-year — the largest single-year decline in that benchmark. The $59-per-dedicated-IP add-on economics that make 10-IP production configurations prohibitively expensive compared to bundled alternatives. Account suspension patterns on undocumented rate limits surfacing in G2 and Reddit reviews. If Mailgun's trajectory is no longer working for your sending program, Authorize Hosting is a Swedish independent operator since 2003 with 10 dedicated IPs included from €399/month entry tier. Data verified April 2026.
The Mailgun trajectory and why 2026 is a migration year
Mailgun launched in 2010 as a developer-focused email API. It built a reputation over a decade on clean documentation, reliable SMTP relay, and a pricing structure that worked for the growing SaaS startups that became its core customer base. Rackspace acquired the company in 2012, Thoma Bravo picked it up in 2019, and Sinch AB — a Swedish CPaaS (Communications Platform as a Service) holding company — bought the entire Pathwire portfolio (Mailgun, Mailjet, Email on Acid) in September 2021 for approximately $1.9 billion.
That acquisition changed the product trajectory in ways that became visible over the following years and now, in 2026, are driving a measurable wave of Mailgun-alternative searches. The permanent free tier disappeared in 2021. Base pricing increased — multiple 2026 reviews report 20-40% price increases since the Sinch acquisition, making "Expensive" the #1 complaint on G2 with 11 separate mentions. The Optimize add-on platform was introduced separately from the core Email API, adding $49-99/month to the effective bill for customers wanting inbox placement testing and email validation tooling. And GlockApps Q1 2025 testing recorded Mailgun's inbox placement rate falling from 53.8% in Q1 2024 to 26.05% in Q1 2025 — a 27.75% year-over-year decline, the largest in their published benchmark chart.
The shift isn't dramatic day-to-day. It's cumulative. A developer who signed up for Foundation at $35/month three years ago is now paying meaningfully more for the same base service plus the dedicated IP add-ons they didn't originally need, plus the Optimize platform fee for tooling that used to be included, plus email validation charges that didn't exist, all while the inbox placement their application depends on has measurably declined. That's the Mailgun story in 2026, and it's why this page exists.
Authorize Hosting as the independent-operator alternative
Authorize Hosting is a Swedish private company trading continuously since 2003, with CEO Mikael Vainiomaa (LinkedIn) leading the business since 2012 — 23 years of operation and 14 years of CEO continuity. In a category where providers routinely change hands every few years — SendGrid sold to Twilio in 2019, Mailgun to Sinch in 2021, Postmark to ActiveCampaign in 2022, SparkPost to MessageBird/Bird — Authorize Hosting's independence is a structural differentiator for customers who specifically want to avoid acquisition-driven product drift.
The positioning is narrower than Mailgun's: we operate six email-infrastructure products (SMTP Relay, Email API, PowerMTA Servers, Dedicated Email Servers, Cold Email Infrastructure, Managed Deliverability) rather than an omnichannel CPaaS platform spanning SMS, voice, messaging and email. That narrower focus means a pricing structure that doesn't need to cross-subsidize other product lines, operator engagement that isn't filtered through multi-country CPaaS support tiers, and a product roadmap that answers to email-infrastructure customers specifically rather than to CPaaS platform-level priorities. It's deliberately a different product shape than Mailgun became under Sinch.
The essential comparison at a glance
Twenty dimensions of comparison across pricing, infrastructure, product scope, operator profile and post-acquisition trajectory. Data verified April 2026 against mailgun.com, independent 2026 reviews from Prospeo, Sequenzy, SaasPricePulse, AeroLeads and Sinch's official September 2021 acquisition announcement.
| Dimension | Mailgun (Sinch-owned since 2021) | Authorize Hosting |
|---|---|---|
| Parent company | Sinch AB (Stockholm, Sweden) — acquired Pathwire portfolio September 30, 2021 for $1.9B | Independent Swedish private company — no acquisition event, 23 years of operating independently |
| Sister products under same parent | SendGrid, Mailjet, Email on Acid — all Sinch-owned | None — email infrastructure is the sole product focus |
| Corporate drift since acquisition | 20-40% reported price increases since Sinch acquisition (G2, Prospeo 2026 reviews) | No acquisition event; published pricing stable and consistent |
| Free tier | Sandbox only: 100 emails/day (~3,000/month) with 1-day log retention, ticket support only | None by deliberate design — plans start at production scale from day one |
| Entry paid plan | Basic $15/mo (10,000 emails, shared IPs, 1-day log retention) | SMTP Relay Starter €399/mo (10,000 emails/day, 10 dedicated IPs included) |
| Mid-tier plan | Foundation $35/mo (50,000 emails, overage $1.30/1K, shared IPs) | Email API Starter €469/mo (10,000 emails/day, 10 dedicated IPs, webhooks, idempotency) |
| Dedicated-IP plan | Scale $90/mo (100,000 emails, 1 dedicated IP included) | Growth €749/mo (25,000 emails/day, 15 dedicated IPs, priority support) |
| 10 dedicated IPs cost | $90 + 9 × $59 = $621/mo on Scale + add-ons | €399/mo SMTP Relay Starter with 10 IPs and operator-led warming bundled |
| Per-IP add-on model | $59/month per additional dedicated IP (linear scaling) | No per-IP add-ons; IP count scales with plan tier |
| Overage charges | $1.80/1K (Basic), $1.30/1K (Foundation), $1.10/1K (Scale) — compound quickly past plan limits | Custom plan upgrade path; no overage billing on published tiers under fair-use caps |
| Deliverability tooling | Optimize add-on platform: $49/mo (Pilot) or $99/mo (Starter) — billed separately | Included in Managed Deliverability product line; not a separate add-on on SMTP Relay or API plans |
| Email validation | $1.20/100 validations beyond plan allocation | Integrate with external verification (ZeroBounce, NeverBounce) per customer choice |
| Independent deliverability testing (Q1 2025) | 26.05% inbox placement (GlockApps) — down from 53.8% Q1 2024, the largest single-year decline in that benchmark | Dedicated-IP performance varies by customer discipline; no single-number claim |
| Account suspension posture | Multiple 2026 reviews report suspensions on undocumented rate limits, limited appeal pathway | Direct operator relationship from day one; suspensions require documented cause with operator contact |
| EU data residency | Available as $10/mo add-on; core infrastructure and data processing remain US-origin despite Swedish parent | EU-native by default — Swedish operator, data centres Sweden/Germany, no cross-border transfer mechanics required |
| Support model | Ticket-based; CPaaS-platform support tier structure; "poor customer support" cited in G2 reviews | Direct operator engagement from day one on all monthly plans |
| Log retention | 1 day (Basic/Foundation), 5 days (Foundation+), 30 days (Scale) | 30 days Starter, 60 Growth, 90 Scale; custom retention on Custom plans |
| Operator | Mailgun by Sinch (Stockholm HQ); Pathwire original HQ San Antonio, Texas; US-origin infrastructure retained | Authorize Hosting — Stockholm, Sweden; CEO Mikael Vainiomaa since 2012 |
| Operator continuity | Acquired twice in 10 years (Rackspace 2012, Thoma Bravo 2019, Sinch 2021); current trajectory tied to Sinch CPaaS roadmap | 23 years of operating independently since 2003; CEO-led since 2012; no acquisition event |
| Best-fit customer profile after 2026 trajectory | Teams accepting CPaaS platform integration and post-acquisition economics as reasonable trade-offs | Teams wanting independent-operator stability, EU-native jurisdiction, bundled dedicated IPs, operator-led deliverability |
Pricing: the compound cost that erodes Mailgun's value proposition
Mailgun's headline pricing doesn't look expensive in isolation. Basic at $15/month and Foundation at $35/month sit competitively against equivalent tiers elsewhere. The cost problem is compound — base plan plus overage plus dedicated IP add-ons plus validation plus Optimize plus EU residency surcharge. Three concrete configurations illustrate how the numbers actually stack.
Configuration 1: SaaS app with 50K emails/month, shared IPs, Foundation plan
For a small SaaS product running transactional email at 50K/month on shared IPs, Mailgun Foundation at $35/month is the headline answer. No overage, no dedicated IP add-on needed, no Optimize subscription required. The configuration works until volume grows past 50K/month — at 80K monthly, the 30K overage at $1.30/1K adds $39, bringing the bill to $74/month; at 150K monthly, the overage alone is $130/month bringing the total to $165/month. Growth past Foundation's 50K allowance becomes the cost-acceleration vector. Authorize Hosting does not compete in this configuration profile — entry tier at €399/month is structurally more expensive, and dedicated IPs on sub-100K-volume transactional are operationally optional rather than required. Verdict: Mailgun Foundation wins decisively for pure shared-IP sub-50K transactional.
Configuration 2: Production SaaS with 10 dedicated IPs and 100K-300K emails/month
This is the configuration where the Mailgun economics break down and Authorize Hosting becomes structurally cheaper. On Mailgun, 10 dedicated IPs require Scale plan ($90/month, 1 IP included) plus 9 × $59 IP add-ons = $621/month just for the IP configuration, before any sending volume overage. Add Optimize at $49-99/month for inbox placement testing and email validation beyond plan allocation, plus EU data residency at $10/month, and the effective monthly cost reaches $680-770 range. On Authorize Hosting, SMTP Relay Starter at €399/month includes 10 dedicated IPs, ~300K/month capacity (10K emails/day × 30 days), operator-assisted 14-28 day warming, and EU-native operation with no residency surcharge. Raw delta: approximately €222-370/month cheaper depending on what Mailgun add-ons apply.
What the headline misses: the Mailgun configuration is assembled from separately-billed components, each of which is subject to independent price revision over time. The 20-40% price increases reported since the Sinch acquisition apply differently to different components — base plans, IP add-ons, Optimize tooling, validation services all compound separately. Authorize Hosting's single bundled price means one price-change decision rather than four. For teams modeling 3-5 year infrastructure costs, the compound uncertainty is a material factor. Verdict: Authorize Hosting wins decisively on equivalent 10-IP production configuration.
Configuration 3: Enterprise sender at 1M+ emails/month across multiple subdomains
At enterprise scale the comparison requires custom pricing on both sides. Mailgun Enterprise pricing is quote-based, typically with 20+ dedicated IPs across pools, dedicated technical account manager, and SLA commitments. Authorize Hosting Custom plans start around €3,500/month for enterprise volumes and can span multi-server PowerMTA clusters, cold-email-isolated infrastructure, and dedicated server fleets with operator-specified MTA choice. At enterprise volumes the price comparison becomes quote-to-quote rather than published-tier-to-published-tier. Verdict: configuration-dependent. For enterprise evaluation, request custom pricing from both and compare the total bundle including operator engagement, warming support, and SLA terms.
The deliverability decline that frames everything else
Mailgun's deliverability is not what it was pre-acquisition. GlockApps Q1 2025 benchmark testing recorded Mailgun's inbox placement at 26.05% — down from 53.8% in Q1 2024, the largest single-year decline in their published comparison chart covering major ESPs. A 27.75 percentage-point drop in 12 months is not normal noise in a deliverability benchmark; it reflects underlying changes in shared-pool hygiene, IP reputation management, or both. Independent reviews cite account suspension patterns for undocumented rate limits that may be the downstream of more aggressive anti-abuse policing to compensate for pool-reputation pressure.
This matters because deliverability is the whole point of a transactional email provider. A password reset that lands in spam is a UX failure; an order confirmation that doesn't arrive at all is a revenue problem. If the platform's measured inbox placement has halved year-over-year, the rest of the evaluation — pricing, support, features — becomes secondary to whether emails are reaching inboxes. Authorize Hosting doesn't publish a single inbox-placement number because on dedicated IPs the outcome depends substantially on customer discipline, list hygiene and content quality. But the structural difference matters: dedicated-IP senders aren't exposed to shared-pool reputation decline the way Mailgun shared-IP customers are. The broader 2026 context tightens the margin further: Google's RETVec filter improved spam detection 38% and reduced false positives 19.4%; Gmail and Yahoo's February 2024 bulk-sender requirements mandate complaint rates below 0.1%, SPF/DKIM alignment and one-click list-unsubscribe via RFC 8058. Shared-pool reputation pressure shows faster in 2026 than it did in 2022.
Six reasons teams are searching for Mailgun alternatives in 2026
Synthesized from G2 reviews, Reddit threads, Prospeo's 2026 Mailgun breakdown, Sequenzy's Mailgun-alternatives analysis, and the Spotler case-for-European-infra piece. These are the specific pain points driving the 2026 migration wave.
Post-Sinch-acquisition price increases
Widely reported 20-40% price increases since the September 2021 Sinch acquisition. "Expensive" is the #1 complaint on G2 with 11 separate mentions. The increases compound across base plan, overage rates, dedicated IP add-ons ($59/mo each), Optimize platform ($49-99/mo), and email validation ($1.20/100). Foundation at $35/month grows to $230+ monthly once overage hits at 200K/month volume — 6.5x the sticker price.
Inbox placement decline from 53.8% to 26.05%
GlockApps Q1 2025 benchmark recorded Mailgun's year-over-year inbox placement falling 27.75 percentage points — the largest single-year decline in that table. For transactional applications where reaching the inbox is the whole point, the measured decline is a direct business risk that compounds the pricing story.
Account suspensions on undocumented rate limits
Reddit and G2 reviews document account-disabling patterns triggered by rate limits that weren't surfaced to customers before hitting them. One notable example: a developer sending 95 emails successfully, then 112 emails later, getting permanently disabled for a 100 emails/hour limit. Appeals are documented as going nowhere. For production transactional email, that's a serious operational risk.
CPaaS strategic drift away from email-specific customers
Mailgun's product direction since the Sinch acquisition has moved upmarket toward enterprise CPaaS integration — SMS, voice and messaging alongside email. Smaller and mid-market senders report feeling the platform drifted away from them rather than with them. Features they value (pricing predictability, responsive email-specific support) have become harder to count on; features they don't need (omnichannel CPaaS integration) have gained product attention.
US-origin infrastructure despite Swedish parent
Sinch is Stockholm-headquartered, but Mailgun's core infrastructure and data processing remain US-origin. For European businesses, this means ongoing GDPR cross-border transfer complications — Standard Contractual Clauses, Schrems II supplementary safeguards, and a compliance posture that requires ongoing legal attention. EU data residency is available at $10/month, but migration between regions can cause temporary service disruption.
$59-per-IP add-on model at dedicated-IP scale
Mailgun's dedicated-IP economics scale linearly: $59/month per additional IP on top of the Scale plan base. For teams requiring 10+ dedicated IPs for reputation segmentation across subdomains or sending shapes, the add-on economics produce the $621/month 10-IP configuration that makes bundled alternatives structurally cheaper. This isn't an argument against $59/IP pricing in general — it's an observation about scale configurations where the per-IP model stops competing with bundled models.
Migration path: from Mailgun to Authorize Hosting
Mailgun migrations follow a structured 4-week runbook. The most common trigger is the combination of pricing drift and deliverability concerns pushing past what additional Mailgun add-ons can solve — at which point teams look for independent-operator alternatives that don't replicate the CPaaS-acquisition pattern. The migration engagement is included in the first month on all monthly plans.
For teams on Mailgun Foundation with 50K-200K monthly volume that doesn't justify dedicated-IP infrastructure economics, honest recommendation: SMTP2GO, Brevo or staying on Mailgun may be more appropriate than Authorize Hosting. We'll flag that during scoping rather than overselling the product. The migration path is documented because it's real — not because every Mailgun customer should take it.
Who should migrate and who should stay
Not every Mailgun customer benefits from migrating. The 2026 pain points hit different customer profiles differently. This section is deliberately explicit about when migration makes sense and when it doesn't.
Migrate: 10+ dedicated IPs for production reputation
Teams running 10+ dedicated IPs on Mailgun's $59/IP add-on model are paying $621/month for the 10-IP configuration before any other costs. Authorize Hosting Starter at €399/month bundles the equivalent. At 20 IPs the Mailgun cost is $1,091/month ($90 base + 19 × $59) vs Authorize Hosting Scale at €1,499/month — Mailgun is still cheaper raw, but adding Optimize, EU residency and overage erodes the delta.
Migrate: EU-native jurisdiction is required
Sinch being Swedish doesn't resolve Mailgun's US-origin infrastructure. For GDPR-conscious European organizations requiring EU-member-state operator accountability or Swedish/German data residency without migration disruption, Authorize Hosting's Swedish-native operation eliminates the cross-border transfer mechanics entirely.
Migrate: Operator-led warming and direct relationship matter
Mailgun's support model is ticket-based within the broader Sinch CPaaS support structure. Authorize Hosting operates direct operator relationships from day one — named operator engagement during incidents, proactive warming guidance, receiver-relationship work when blocklist issues arise. Teams whose business-critical sending needs that operational layer benefit from the structural difference.
Stay: Small transactional at 10K-50K emails/month on shared IPs
Mailgun Basic ($15/month) and Foundation ($35/month) are priced for exactly this profile — small SaaS transactional on shared infrastructure. Authorize Hosting's €399/month entry tier is structurally wrong for sub-50K/month programs. Migration doesn't make economic sense at this volume; accept Mailgun's current pricing or evaluate SMTP2GO ($10/month), Brevo ($9/month) or Amazon SES ($0.10/1K) as alternatives in the shared-IP tier.
Stay: Sinch omnichannel CPaaS integration is actively used
If you're using Sinch's broader platform — Mailgun for email, SMS via Sinch, voice, messaging — the CPaaS integration is a legitimate reason to accept the post-acquisition trajectory. Single-vendor CPaaS simplification has real operational value. Authorize Hosting doesn't compete on CPaaS; we compete on email-infrastructure specialization specifically.
Evaluate: Mid-market 100K-500K/month sending with mixed profile
This is the profile where the evaluation matters most. The Mailgun post-acquisition drift affects this segment more than small transactional or pure enterprise. Dedicated-IP economics start crossing over around 5-10 IPs. Operator-led warming becomes a real differentiator. EU-native jurisdiction becomes a compliance consideration. Worth scoping Authorize Hosting directly against current Mailgun trajectory before the next Mailgun pricing change forces the decision anyway.
Other independent-operator alternatives if Authorize Hosting isn't the right fit
Authorize Hosting isn't the only independent-operator alternative to Mailgun. For teams whose primary concern is escaping CPaaS-acquisition drift specifically, two other credible independent operators exist in 2026. SMTP2GO is New Zealand-based, trading continuously since 2006 under private ownership, with SOC 2 Type II and ISO 27001 certifications achieved in 2024 and a 95.5% inbox placement in EmailTooltester's March 2026 benchmark — structurally similar independent-operator profile to Authorize Hosting with different volume-slot optimization. Postmark is ActiveCampaign-owned since 2022, which is an acquisition but to a marketing-automation parent rather than a CPaaS conglomerate — the strategic trajectory is different from Mailgun's Sinch fate. Both are worth evaluating alongside Authorize Hosting. SendGrid is also Sinch-owned (via Twilio), so migrating from Mailgun to SendGrid doesn't solve the acquisition-parent concern.
Frequently asked questions about migrating from Mailgun
Direct answers on common migration questions
Why are teams leaving Mailgun in 2026?
Three recurring reasons documented in 2026 reviews. First, reported 20-40% price increases since the September 2021 Sinch acquisition, with Foundation moving from a lower base to $35/month and dedicated IPs priced at $59 each per month as an add-on rather than as a bundled inclusion. Second, a measured inbox placement decline — GlockApps Q1 2025 testing recorded Mailgun dropping from 53.8% to 26.05% inbox placement year-over-year, the largest single-year decline in that benchmark. Third, account suspension patterns that surface in G2 and Reddit reviews: undocumented rate limits, account disabling without warning, and appeals that don't always resolve. The underlying driver is acquisition-led strategic drift — Mailgun has moved upmarket toward enterprise CPaaS integration since the Sinch purchase, leaving smaller and mid-market senders feeling the platform has drifted away from them rather than with them.
What's the difference between Mailgun and Authorize Hosting?
Product architecture, operator model, and pricing structure. Mailgun is part of Sinch AB's CPaaS (Communications Platform as a Service) portfolio since the $1.9 billion Pathwire acquisition in September 2021, alongside sister products SendGrid, Mailjet and Email on Acid — all under the same corporate roof. Pricing is volume-tiered with dedicated IPs sold separately at $59 per IP per month, email validation billed at $1.20 per 100 beyond plan allocation, and the Optimize add-on platform at $49-99 per month for deliverability tooling. Authorize Hosting is a single-product Swedish operator that has been trading continuously under the same leadership since 2003. Pricing is fixed monthly with dedicated IPs bundled from the entry tier: 10 dedicated IPs on Starter at €399/month, 15 on Growth at €749, 20 on Scale at €1,499. No per-IP add-ons. No separate deliverability-tooling subscription. The product focus is email infrastructure exclusively — not one component of a broader CPaaS platform.
How much does Mailgun really cost after the Sinch acquisition?
The base plan prices are Basic $15/month for 10,000 emails, Foundation $35/month for 50,000 emails, and Scale $90/month for 100,000 emails with 1 dedicated IP included. Where the real cost lives: overage charges at $1.30/1,000 on Foundation (which scales fast — a team on Foundation hitting 200K emails monthly pays $35 base plus 150K overage at $1.30/1,000 = $230/month, 6.5x the sticker price), email validation costs ($1.20 per 100 validations beyond plan), dedicated IP add-ons at $59/IP/month, and EU data residency surcharge at $10/month. The Optimize add-on platform for inbox placement testing starts at $49/month (Pilot) or $99/month (Starter) — these are billed separately from the base email plan. Multiple 2026 reviews report 20-40% price increases since Sinch's September 2021 acquisition. The platform's pricing isn't high in isolation; it's the compound cost of add-ons that erodes the value proposition for growing senders.
Did Mailgun's deliverability really decline?
Yes, per GlockApps Q1 2025 published data. GlockApps tracked Mailgun's inbox placement rate falling from 53.8% in Q1 2024 to 26.05% in Q1 2025 — a 27.75% year-over-year decline, the largest in their published comparison chart. Other 2026 benchmarks paint consistent pictures: G2 reviews cite 'Expensive' as the top complaint (11 mentions) and 'poor customer support' and 'lack of communication regarding account issues' totaling 10 combined mentions. Individual customer reports on Reddit describe account suspensions triggered by undocumented rate limits — one example: a developer sending 95 emails successfully, then 112 emails later, getting permanently disabled for a 100 emails/hour limit they weren't aware of. The combination of pricing drift, deliverability decline and support-quality complaints is what's driving the 2026 wave of migration searches for 'Mailgun alternative.'
Is Authorize Hosting cheaper than Mailgun on equivalent configurations?
For configurations that match dedicated-IP production profiles, yes — meaningfully. Equivalent 10-dedicated-IP configuration on Mailgun: Scale plan $90/month includes 1 dedicated IP, so 10 IPs requires $90 + 9 × $59 = $621/month just for the IP configuration, before any sending volume overage. On Authorize Hosting: SMTP Relay Starter at €399/month includes 10 dedicated IPs plus 10,000 emails/day (~300K/month) capacity with operator-led 14-28 day warming bundled. The raw delta is ~€222/month saved ($621 Mailgun vs €399 Authorize Hosting equivalent). Add EU data residency ($10/month surcharge on Mailgun, zero on Authorize Hosting since we're Swedish by default) and the Optimize platform fee ($49-99/month extra on Mailgun, zero on Authorize Hosting since deliverability engagement is operator-bundled), and the delta widens further. For shared-IP low-volume transactional — Mailgun Basic $15/month for 10,000 emails — Mailgun is meaningfully cheaper and Authorize Hosting isn't the right product for that profile.
Does Mailgun have a free tier?
Only a sandbox tier: 100 emails per day (approximately 3,000/month) with 1-day log retention and ticket-only support, meant for testing and development rather than production. The permanent free tier that existed pre-acquisition was retired in 2021. For comparison, Authorize Hosting doesn't offer a free tier or free trial — plans start at production scale from day one with dedicated IPs included and operator engagement during onboarding. For teams whose primary need is a free production tier, neither Mailgun (sandbox only) nor Authorize Hosting (no free tier) is the correct answer; SMTP2GO's permanent 1,000/month free tier or Elastic Email's 100/day free tier are more suited.
Does the Sinch acquisition matter for European customers specifically?
Yes, more than the Swedish parent name suggests. Despite Sinch being headquartered in Stockholm, Mailgun's core infrastructure and data processing remain US-origin. For European businesses, this creates GDPR cross-border transfer complications: Standard Contractual Clauses that need documenting, Schrems II supplementary safeguards, and a compliance posture that requires ongoing legal attention rather than being structurally resolved. Mailgun does offer EU data residency as a $10/month add-on, but migration between US and EU regions can cause temporary service disruption and requires DNS reconfiguration. Authorize Hosting is Swedish-native: operator based in Stockholm, default data centres in Sweden and Germany, EU jurisdiction by default. For GDPR-conscious European organizations, EU-native operation versus EU-as-configurable-option is a structural difference. The Sinch acquisition didn't change Mailgun's underlying US infrastructure; it changed the corporate parent without resolving the data-residency mechanics.
Can Authorize Hosting handle our Mailgun migration?
Yes. Mailgun migrations are typical engagements with a documented 4-week runbook. Week 1: DNS authentication setup (SPF, DKIM, DMARC) on Authorize Hosting infrastructure; subdomain strategy decisions if separating transactional from marketing traffic; Mailgun account audit to document webhooks, inbound routes and integrations that need replication. Week 1-2: 14-28 day operator-assisted warming on new dedicated IPs — Mailgun shared-pool reputation does not transfer, so warming starts fresh. Week 2-3: dual-send window with critical transactional routes running through both Mailgun and Authorize Hosting in parallel; bounce rates, complaint rates and delivery timing monitored on both sides. Week 3-4: cutover with Postmaster Tools enrollment, Mailgun subscription wind-down, and 30-day post-cutover operator monitoring. Migration engagement is included in the first month. For teams on Mailgun Foundation with 50K-200K monthly volume that doesn't justify dedicated-IP infrastructure economics, we'll honestly flag SMTP2GO or Brevo as more appropriate destinations rather than overselling our own product.
What about migrating from Mailgun to SendGrid instead?
Sinch owns both Mailgun and SendGrid — the acquisition portfolio spans both transactional email brands under the same corporate roof since 2019 (SendGrid to Twilio first, then Twilio's broader reshuffling). For teams whose primary concern with Mailgun is Sinch acquisition drift, moving to SendGrid doesn't solve the problem — you're still under the same CPaaS parent structure, subject to the same acquisition-led strategic decisions, with the same risk of future pricing changes or product direction shifts. SendGrid also eliminated its permanent free tier on May 27, 2025, which was a parent-level decision. If acquisition concerns are driving the migration, independent operators like Authorize Hosting, SMTP2GO (NZ independent since 2006), or Postmark (owned by ActiveCampaign rather than a CPaaS holding) are more structurally different exits. If acquisition concerns aren't driving the migration and the specific pain is pricing or feature fit, SendGrid can be a lateral move worth evaluating.
When is Mailgun still the right choice?
Mailgun remains a reasonable choice when: (1) your sending volume is 50,000-500,000 emails/month range and shared IPs or a single dedicated IP are sufficient for your reputation needs, (2) your team values the specific Mailgun developer experience and API ergonomics that have been refined since 2010 — the platform has genuine maturity here, (3) you want the Sinch omnichannel integration (SMS, voice, messaging alongside email) and the single-vendor simplification justifies the CPaaS lock-in, (4) the Optimize add-on tooling for inbox placement testing and email validation fits your deliverability workflow, or (5) US-origin infrastructure is not a compliance issue for your organization. Mailgun is not the right choice when dedicated reputation isolation at 10+ IPs matters from day one, when EU-native jurisdiction is required for compliance, when operator-led warming is the operational need, or when the 2026 trajectory of pricing increases and inbox placement decline is a business risk you're not willing to absorb.