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SendGrid alternative: Irisend vs SendGrid
SendGrid (now folded into Twilio.com) prices by plan tier rather than a simple per-1,000 overage, and its Mail Send API supports a notably larger single-request batch than Irisend's. The two APIs otherwise solve the same problem from different request shapes.
Facts below are sourced from Twilio's SendGrid pricing page and Mail Send API reference, fetched 3 November 2026. Irisend is in early access: every team sends free today (capped at 10,000 emails/month); any Irisend price mentioned below is its listed launch pricing, not yet billed.
Information checked on ; see sources at the bottom of this page. Facts come from SendGrid's own pricing and docs pages, recorded in docs/research/2026-11-03-competitor-comparison.md.
Feature by feature
| Feature | Irisend | SendGrid |
|---|---|---|
| Starting price | Free today (early access, 10,000 emails/mo cap, no credit card) · listed launch price from €20/mo | Free trial: 100 emails/day for 60 days (no credit card). Paid from Essentials at $19.95/mo. |
| Price at 100,000 emails/mo (listed) | €35/mo listed launch price (Pro plan, 100,000 emails/mo) — not yet billed; every team sends free during early access | Not verified from the primary sourceSendGrid's pricing page uses a JS volume slider that did not render a specific dollar figure for the 100,000-email tier in the page fetched 3 November 2026 — left out rather than guessed. |
| Free tier | 3,000 emails/mo, 100/day cap, no overage, once the listed plans take effect | 100 emails/day for 60 days — a time-limited trial, not a standing free tier |
| SMTP relay | smtp.irisend.com, ports 465 (implicit TLS) / 587 (STARTTLS) | Included (SMTP and API both listed under every tier's "Straightforward Integration" features) |
| Idempotency key on send | Idempotency-Key header, 24h, checked against the request body (409 on a changed replay) | No Idempotency-Key header or equivalent field documented in the Mail Send API reference |
| Webhook signing | Standard Webhooks / Svix-compatible HMAC (byte-compatible with existing svix verifiers) | Not confirmed from the pages fetched |
| Sending regions | us-east-1, eu-west-1, sa-east-1, ap-northeast-1 — selectable per domain | EU regional sending exists but is gated to Pro plan or above, and requires a dedicated EU subuser + EU IP address |
| Dedicated IPs | Not offered | 1 dedicated IP included from the Pro plan ($89.95/mo) up; none on Free trial/Essentials |
| Self-host on your own AWS | No — all sending runs on Irisend's own managed AWS SES; no bring-your-own-AWS option ships today | No bring-your-own-AWS option found on SendGrid's pages |
| DMARC monitoring | Built in: pass-rate summary, source breakdown, raw aggregate reports per domain | Not found on SendGrid's pricing page |
| Sub-accounts / multi-tenant | Built in: Connect sub-accounts with an embeddable React domain-verification widget | Not found on SendGrid's pricing page (subuser management exists for teammates/IP pools, a different feature) |
| SOC 2 Type II (own audit) | Not yet — publicly stated as a roadmap item, not claimed | Listed as a line item in the plan-gated "Privacy and Security" feature table; not universal across every tier the way Resend's is |
What Irisend does that SendGrid doesn't
A documented idempotency key
SendGrid's v3 Mail Send request schema — personalizations, from, content, attachments, template_id, tracking_settings, mail_settings — has no idempotency header or field anywhere in the reference reviewed. Irisend's Idempotency-Key is a first-class, documented 24-hour contract.
One flat overage rate instead of a tiered plan ladder
Every Irisend paid plan and pay-as-you-go lists the same €0.70/1,000 overage rate (not yet billed — early access is free); SendGrid's per-tier dollar pricing for a specific volume wasn't published on the page checked, which is itself a transparency difference worth noting.
EU region without a plan gate
Irisend's eu-west-1 region is available on every plan, including Free. SendGrid's EU regional sending requires Pro plan or above plus a dedicated EU subuser.
Where SendGrid is honestly stronger
A much larger single-request batch
SendGrid's personalizations array supports up to 1,000 recipients per Mail Send request. Irisend's batch endpoint caps at 100 emails per request (batchEmailSchema) — a real ceiling difference for very large single-call sends.
Twilio's wider communications platform
SendGrid sits inside Twilio's broader SMS/Verify/communications ecosystem, which is a meaningfully larger platform than a standalone email API for teams already on Twilio.
Dedicated IPs from a lower volume tier
SendGrid includes a dedicated IP from the Pro plan; Irisend doesn't offer dedicated IPs at all today.
Production pricing, live today
SendGrid's prices above are what customers actually pay right now. Irisend is still in early access (free for everyone, capped at 10,000 emails/month) — its listed launch prices aren't billed yet.
Verdict
If a single request needs to fan out to hundreds of recipients at once, SendGrid's 1,000-per-request batch is a real capability Irisend doesn't match yet. For idempotent retries, a flat overage rate, and EU sending without an upgrade, Irisend is the more transparent default.
Frequently asked questions
Related guides
Next
Read the full API reference, the Resend migration guide, or see pricing.
Sources (checked 3 November 2026)
SendGrid is a trademark of its respective owner. Irisend is not affiliated with, endorsed by, or sponsored by SendGrid. Spotted an inaccuracy? [email protected].