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SendGrid alternative for transactional email
SendGrid is built for high-volume mail across marketing and transactional use cases. SuperSend TX isolates transactional delivery on infrastructure we operate — with Pool and Dedicated when you need your own lane.
- Isolated transactional email
- Flat POST /emails
- Owned Pool · Dedicated
At a glance
Transactional delivery without shared marketing fate
If you need receipts, auth mail, and alerts, keep them on a pipe that does not share reputation with campaigns.
| Attribute | SendGrid | SuperSend TX |
|---|---|---|
| Transactional reputation | Often mixed with marketing | Isolated transactional pipe |
| Send API | POST /v3/mail/send | POST /emails |
| Auth | SG.… API key | Bearer stx_… |
| Payload | personalizations + content[] | Flat from / to / subject / html |
| npm | @sendgrid/mail | supersendtx |
| Infra story | Twilio SendGrid cloud | Owned transactional network; Dedicated available |
| Entry paid plan | SendGrid Essentials / Pro | Pro from $20/mo · Scale volume slider |
Who this is for
Products that need transactional mail to arrive
Keep critical sends on infrastructure where marketing blasts never share the same delivery fate.
Isolated transactional pipe
Pool carries mail that has to arrive — receipts, auth, alerts — without sharing reputation with marketing streams.
Flat send payloads
from, to, subject, html — no nested personalizations array for everyday transactional sends.
Deliverability ops included
Warmup, bounce handling, complaints, suppressions, and open/click signals managed on the platform.
Path to Dedicated
Owned servers and IPs when you need isolation — same API as Pool, managed by us.
Migration
Replace v3 mail/send with POST /emails
Swap the package, flatten the payload, and map Event Webhook handlers to signed SuperSend TX endpoints.
- 1
Create a key
Issue a stx_ API key and verify the domain you send from.
- 2
Swap the client
Replace @sendgrid/mail (or raw v3 calls) with supersendtx or HTTP.
- 3
Flatten the body
Map personalizations and content[] into flat from / to / subject / html fields.
- 4
Reconnect events
Remap Event Webhook handlers using the SendGrid migration guide.
- Transactional mail on an isolated pipe — marketing never shares transactional reputation
- SMTP relay for apps that already speak SMTP
- Webhooks, templates, automations, inbound, SDKs, CLI, and MCP on every plan
SuperSend TX is now Ranla
Same critical transactional email on the same infrastructure — signup and pricing live on ranla.ai, with an AI growth marketer included.
FAQ
SendGrid migration FAQ
How do SendGrid v3 mail send calls map to SuperSend TX?
Replace personalizations and content arrays with a flat JSON body: from, to, subject, and html or text on POST /emails. The SendGrid migration guide has a full field mapping table.
What replaces SendGrid dynamic templates?
Use SuperSend TX templates with an alias on send: visual editor with versioned publish, or pass html/text directly. React Email and CLI push are supported for code-first teams.
How do SendGrid Event Webhooks compare?
SuperSend TX webhooks cover delivery, bounce, complaint, and open events. Configure endpoints in the dashboard and verify signatures.
Can I keep using SMTP?
Yes. smtp.supersendtx.com:587 with dashboard SMTP credentials — useful while you migrate HTTP sends or for providers that require SMTP.