We may earn a commission if you buy through links on this page. It never changes a score or a ranking. How we make money
Most buyers should pick SendPost.
Twilio SendGrid is a hosted Email API and SMTP service with marketer campaign tools and a 60-day trial. SendPost is a cloud MTA and delivery service built around deliverability visibility, alerts and sending controls. We’d choose SendGrid for teams evaluating a trial or needing campaigns alongside delivery. SendPost fits teams that need ISP-level monitoring, routing controls and SDKs in six programming languages. Compare prices at equivalent volumes: their listed tiers cover different monthly email counts.
01Side by side
| Twilio SendGrid | SendPost | |
|---|---|---|
| Pricing model | Monthly tiers tied to email volume | Monthly tiers tied to email volume |
| Free tier | 60-day trial; 100 emails/day | No free plan; trial not listed |
| API and SDKs | Email API and SMTP service | Email API, SMTP relay, six-language SDKs |
| Documentation | API documentation on Twilio.com | API docs and full API reference |
| Integrations | Partner integration and custom solutions | Webhooks, Slack workflows, API and SMTP |
| Deployment model | Hosted email API and service | Cloud MTA and delivery service |
| Platforms | Web | Web |
| Listed volume limits | Pro tiers up to 2.5 million emails/month | Scale tier lists 3 million emails/month |
Twilio SendGrid Choose Twilio SendGrid if
- Choose Twilio SendGrid if you want a 60-day trial.
- Choose Twilio SendGrid if you need email campaigns for marketers.
- Choose Twilio SendGrid if you want an Email API and SMTP service.
SendPost Choose SendPost if
- Choose SendPost if ISP-level delivery visibility is a priority.
- Choose SendPost if you need throttling, routing and sender queues.
- Choose SendPost if you want SDKs in six programming languages.
02Pricing at real usage
SendGrid’s free trial runs 60 days and includes 100 emails/day, one additional teammate and one event webhook. Its first paid tier is Essentials at 50,000 emails/month for $19.95; Essentials at 100,000 is $34.95. Pro starts at $89.95/month for 100,000 emails, with one dedicated IP. SendPost lists no free plan or trial. Its Starter tier is $7/month for 10,000 emails, Growth is $197 for 600,000, and Scale is $997 for 3 million. Those tiers make SendPost cheaper at entry, but the included volumes differ. SendPost overage rates are not published. SendGrid’s listed Pro tiers range from $249/month for 300,000 emails to $1,099 for 2.5 million. Annual prices are not published for either. SendPost says current self-serve pricing is available on request after scheduling a demo.
03API, SDKs and integration
SendGrid provides an Email API and SMTP service for delivery, plus campaign tools for marketers. Its documentation is available on Twilio.com and covers integration and sending. The homepage does not identify SDK languages or CLI tooling, so confirm those details against the documentation for your stack. SendGrid partners can help integrate the API, optimize deliverability or build a custom solution.
SendPost connects through an Email API or SMTP relay, with webhooks for email events. It lists SDKs in six programming languages, but does not name them in the product details; verify that your language is supported before adopting it. Its API documentation includes a full reference and an aggregate-stats endpoint. SendPost also supports Slack alerts and command workflows, alongside controls for routing, throttling and sender queues. It says the service can work alongside a current MTA, which may allow staged migration rather than replacing existing sending infrastructure at once.
04Open source, self-hosting and lock-in
Neither product is documented as open source or self-hostable. SendGrid is a hosted API and SMTP service; SendPost describes itself as a cloud MTA and email delivery service. Neither vendor specifies a data-export format or process, so ask about retrieving message events, suppression data, reputation history and configuration before committing.
SendGrid’s email products and documentation now live on Twilio.com. That places the integration within Twilio’s platform, while its API and SMTP service define the sending paths. SendPost says it works alongside a current MTA and promotes fast, low-risk migration, but does not specify a migration procedure. A move between providers will require checking how your application, event webhooks, routing rules and sending reputation are carried over. Confirm export and migration details with each vendor.
Questions people ask
Which is cheaper, Twilio SendGrid or SendPost?
SendPost has the lower listed entry price: $7/month for 10,000 emails. SendGrid’s first paid tier is $19.95/month for 50,000 emails. These are different volumes, so compare the tier that covers your actual monthly sends. SendPost overage rates are not published.
Which platform has stronger deliverability controls?
SendPost lists ISP response and reputation monitoring, AI alerts, per-ISP throttling, routing, sender queues and automated warmup and retries. SendGrid provides email delivery at scale and partner help with deliverability optimization. Teams that need direct sending controls should compare SendPost’s features against their operational requirements.
Can I send email over SMTP with both services?
Yes. Twilio SendGrid offers an SMTP service, and SendPost offers an SMTP relay as well as an Email API. SendPost also lists webhooks for email events. Check each provider’s documentation for the connection and authentication details your application requires.
Can I self-host SendGrid or SendPost?
Neither is documented as a self-hosted product: SendGrid is presented as an email API and SMTP service, while SendPost describes a cloud MTA and delivery service. Ask the vendors about data export and migration procedures if avoiding provider lock-in is a requirement.