How Relayly stacks up

vs SendGrid

The incumbent. Owns the largest installed base, sometimes for reasons that aren't pretty.

Where SendGrid wins

• Twilio integration if you already live in their account hierarchy.
• Compliance certifications older than most of your team.
• Massive battle-tested API surface — every framework has a SendGrid adapter.

Where Relayly wins

• Dedicated IP included on the $25 Pro tier; SendGrid charges $80/mo extra.
• Per-region pinning (EU vs CA) on every send. SendGrid forces a single region per account.
• Reputation data exposed in the dashboard — IP × domain × provider, not just account-wide.
• No "credits" pricing math — flat monthly tiers.

Switch playbook

• Verify your sending domain in Relayly (DNS records overlap with SendGrid's; some can be reused).
• Run dual-send for a week, comparing inbox placement at Gmail / O365 / Yahoo per send.
• Flip your SENDGRID_API_KEY to RELAYLY_API_KEY; the SDK shapes are nearly identical.

vs Resend

The fastest-rising challenger. Loved for the quickstart, criticized once volume picks up.

Where Resend wins

• Beautiful onboarding UI. The bar.
• React Email integration if your stack is Next.js-shaped.
• Active changelog culture and Twitter presence.

Where Relayly wins

• EU data residency and per-region pinning. Resend has no EU region today.
• Marketing tier — lists, segments, automations, signup forms. Resend has Audiences but no automations or visual flows.
• SMTP relay on port 587. Resend is REST + React only.
• Live deliverability brain — actionable IP × provider data, not just send counts.

Switch playbook

• Resend's API shape is similar enough that a sed across your codebase often suffices.
• React Email components keep working — they render to HTML which Relayly accepts directly.

vs Postmark

The deliverability snob. Justifiably proud of inbox-rates, opinionated about scope.

Where Postmark wins

• Razor-sharp focus on transactional. Decade of industry trust.
• Their "broadcast vs transactional" split is well-engineered.
• Excellent template editor.

Where Relayly wins

• Marketing tier in-product — Postmark intentionally has no automations or segments.
• Multi-region (EU + CA) — Postmark is single-region.
• Cheaper at moderate volume — Postmark's 50k tier is $50, ours is $25.
• Provider-aware routing exposes the same craft Postmark hides.

Where Postmark might be the better answer

• Pure-transactional shop, no plans for marketing email, willing to pay 2x for a slightly better inbox rate at Gmail.

vs Mailgun

The infrastructure veteran. Powerful, with all the rough edges that implies.

Where Mailgun wins

• Inbound mail routes are excellent.
• Validations API has been a workhorse for years.
• Foundation tier supports HIPAA BAA at lower spend than competitors.

Where Relayly wins

• Dashboard. Mailgun's UI is showing its age; ours is a modern SPA.
• Per-IP × provider reputation is surfaced clearly. Mailgun gives you logs and asks you to figure it out.
• Real free tier (3,000/mo). Mailgun is 5-day trial only.
• RFC 8058 one-click unsubscribe baked in (Gmail/Yahoo bulk-sender requirement) — Mailgun requires manual configuration.