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Head-to-head · SMTP Relay Services

SocketLabs vs Mailgun

  • Updated Sep 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score SocketLabs #4 in SMTP Relay Services 7.4/10 From $39.95/mo · 30-day trial ✓ 0 of 3 features Visit SocketLabs
Mailgun #8 in SMTP Relay Services 6.6/10 Free plan · 30-day trial Free plan✓ 0 of 3 features Visit Mailgun

SocketLabs leads on 1 check, Mailgun on 1, and 0 are even. Who comes out ahead on the 2 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreSocketLabs · 7.4/10
  • Free planonly Mailgun

SocketLabs scores higher on our rubric for smtp relay services: 7.4 against 6.6 out of 10; our editors rank them #4 and #8.

Mailgun offers free plan; SocketLabs doesn't. SocketLabs leads on monthly send limit: 40000 emails/mo versus 10000 emails/mo.

SocketLabs is the better fit for mid-volume senders needing inbound parsing. Mailgun is the better fit for developers needing established email infrastructure.

  • SocketLabs fits best

    Mid-volume senders needing inbound parsing

  • Mailgun fits best

    Developers needing established email infrastructure

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. How we rank.

Side by side

Feature SocketLabs 7.4/10 Visit ↗ Mailgun 6.6/10 Visit ↗
At a glance
Editor score 7.4 6.6
Ranking #4 in SMTP Relay Services #8 in SMTP Relay Services
Best for Mid-volume senders needing inbound parsing Developers needing established email infrastructure
Pricing model Paid Free plan + paid
Starting price $39.95/mo Not published
Free plan — ✓ (best)
Free trial — —
Free trial length 30 days · no card needed 30 days
Deployment Cloud Cloud
Platforms Web Web
Features SocketLabs 0/3 · Mailgun 0/3
Inbound email parsing Not published Not published
Event webhooks Not published Not published
Subaccounts Not published Not published
Specs
Monthly send limit 40000 emails/mo (best) 10000 emails/mo
Dedicated IP option Not published Not published
Email log retention Not published Not published
Our review
Pros
  • Inbound email parsing delivers messages as JSON to HTTP endpoints.
  • SMTP relay, injection API, webhooks, templates, and reporting in one platform.
  • Dedicated IP options and plans for senders above 1M emails per month.
  • Combines RESTful APIs and SMTP relay for email delivery
  • Adds inbound routing, webhooks, templates, analytics, and suppression tools
  • Scale includes dedicated IP pools, SAML SSO, and live support
Cons
  • No permanent free plan is available.
  • The Core plan includes only 10 days of insight history.
  • Few verified integrations limit prebuilt ecosystem connections.
  • Free plan limits sending to 100 emails per day
  • Dedicated IP pools are listed only on the Scale plan
  • Log retention ranges from five days on Foundation to 30 on Scale
Our verdict

SocketLabs is an email delivery platform for developers, IT teams, and organizations sending transactional or marketing email. It supports SMTP relay sending and an HTTP injection API for outbound messages, while its inbound email parsing…

Read the review →

Mailgun is an email delivery platform for developers, marketers, and product teams. It supports transactional and marketing messages through RESTful email APIs and SMTP relay, with inbound email routing, delivery-event webhooks, reusable…

Read the review →
  1. SocketLabsSMTP Relay Services 7.4From $39.95/mo · 30-day trial
  2. MailgunSMTP Relay Services 6.6Free plan · 30-day trial

Strengths and trade-offs

  • SocketLabs — where it wins

    • Inbound email parsing delivers messages as JSON to HTTP endpoints.
    • SMTP relay, injection API, webhooks, templates, and reporting in one platform.
    • Dedicated IP options and plans for senders above 1M emails per month.

    Where it doesn't

    • No permanent free plan is available.
    • The Core plan includes only 10 days of insight history.
    • Few verified integrations limit prebuilt ecosystem connections.
  • Mailgun — where it wins

    • Combines RESTful APIs and SMTP relay for email delivery
    • Adds inbound routing, webhooks, templates, analytics, and suppression tools
    • Scale includes dedicated IP pools, SAML SSO, and live support

    Where it doesn't

    • Free plan limits sending to 100 emails per day
    • Dedicated IP pools are listed only on the Scale plan
    • Log retention ranges from five days on Foundation to 30 on Scale
  • SocketLabs7.4/10 · From $39.95/mo · 30-day trial

    A capable relay for mid-volume teams that need inbound email workflows.

    Visit SocketLabsFull verdict →
  • Mailgun6.6/10 · Free plan · 30-day trial

    Developer-focused email delivery with SMTP, APIs, inbound routing, and delivery analytics.

    Visit MailgunFull verdict →

More comparisons

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update