Email API comparison
Modern SES-backed sending without SendGrid's legacy product surface.
SendGrid is a mature Twilio-owned platform with broad email capabilities. SMTPfast is narrower and more developer-focused: simple REST and SMTP sending, clear logs, suppressions, domain verification, and lower product complexity.
SMTPfast
The real comparison is not only price; it is whether your team wants a focused API or a large email suite.
SendGrid
Best for: Larger teams that need a long-established vendor and broad integrations.
The useful differences for teams evaluating SendGrid.
SendGrid is a safe enterprise default when procurement and broad integrations matter most. SMTPfast is a better fit when you want a simpler developer-first API, SES-backed deliverability, and clear operational tooling without adopting a large legacy suite.
Try SMTPfast free| Feature | SMTPfast | SendGrid |
|---|---|---|
| Pricing model | Simple volume plans | Monthly subscription tiers |
| Public free tier | 3,000 emails/month | Trial-style free allowance |
| API & Sending | ||
| REST API | ||
| Resend-compatible payloads | ||
| SMTP relay | ||
| Batch sending | 100/request | |
| Idempotency keys | ||
| Inline images (cid) and automatic plain text | ||
| Customer webhooks | ||
| Share links for sent emails | Not published | |
| Marketing & Audience | ||
| Broadcast campaigns | Marketing product | |
| Signup forms | Marketing product | |
| Workflow automation | Planned | Higher tiers |
| Dynamic segments | Planned | Marketing product |
| Hosted templates | Planned | Visual editor |
| Deliverability & Safety | ||
| DKIM/SPF/DMARC guidance | ||
| Custom MAIL FROM | ||
| Suppression management | ||
| Live event tail | ||
| Warmup and abuse controls | ||
| Platform Model | ||
| Inbound email | Paid plans | Parse webhook |
| MCP server for AI agents | Docs only (Twilio) | |
| Terraform provider | Official | Community |
| API key scopes | Per key | |
| Open source | Evaluating | |
| Self-hostable | Evaluating | |
| Team members and roles | Paid plans | |
| No per-seat pricing | ||
SendGrid wins on maturity and breadth. SMTPfast wins when the priority is a simpler developer-first SES-backed API with modern logs, suppressions, SMTP, and fewer enterprise-suite decisions.
Choose SendGrid when its core strength matches your team: Larger teams that need a long-established vendor and broad integrations. SMTPfast is a better fit when you want a developer-first SES-backed API with queues, webhooks, tracking, suppressions, and a focused dashboard already handled.
Most migrations start with domain verification, a test API key, and one low-risk transactional email path. Resend-compatible payloads are especially quick to move; older providers may require mapping template, webhook, and suppression behavior.