Zero Domain
Transactional
Emails.Send Transactional Emails
Without Needing a Domain.
The fastest way for founders and devs to send transactional emails using their product's existing Gmail. Zero domains needed. Zero stress.
curl -X POST https://sendlib.samueltuoyo.com/api/send \
-H "Authorization: Bearer YOUR_KEY" \
-H "Content-Type: application/json" \
-d '{
"from": "sender@gmail.com",
"to": "user@example.com",
"subject": "Hello via Webhook!",
"html": "<p>No SMTP needed.</p>"
}'Stop worrying about domains. Just send.
Traditional email APIs force you to configure DNS records and custom domains before sending a single email. Sendlib uses the Gmail account your product already has.
| Feature | Sendlib | Traditional Email APIs |
|---|---|---|
| Zero Domain Verification | Instant (No domain needed) | Required (DNS verification) |
| Free Emails Per Day | 500 to 2,000 / account | 100 / day |
| Uses Existing Product Gmail | Yes (Google OAuth2) | No (Requires SMTP server) |
Simple, Honest Pricing
Start for free, no credit card required.
Free
No credit card. No expiry. No catch.
- Up to 200 emails/day per connected Gmail
- Up to 1,000 emails/day per Workspace account
- Max 3,500 emails/month total
- No custom domain needed
- Up to 3 connected Gmail accounts
- 5 API keys
- 30 API requests / minute
- 2MB HTML body · 1MB text body
- Up to 5 attachments · 1MB per file
- 50 recipients per field (to/cc/bcc)
- 5 days email log retention
Pro
Higher limits & scale for growing applications.
- Up to 500 emails/day per connected Gmail
- Up to 2,000 emails/day per Workspace account
- Unlimited emails/month total
- Everything in Free (with higher limits)
- Up to 50 connected Gmail accounts
- Up to 100 API keys
- 300 API requests / minute
- 5MB HTML body · 2MB text body
- Up to 20 attachments · 10MB per file
- 90 days email log retention
- Batch email sending
Frequently Asked Questions
Got questions about how Sendlib is different from other transactional email sending platforms? We have answers.
Do I need to verify my domain or configure DNS records?
No! Because Sendlib routes your email relay requests securely through your already verified, connected Google accounts, there is absolutely zero DNS configuration required. You do not need to add SPF, DKIM, MX, or TXT records to start sending immediately.
Can I send from my custom domain (e.g. hello@mycompany.com)?
Yes! If your custom company domain is connected to Google Workspace, simply link that account to Sendlib via Google OAuth. Sendlib will send transactional emails directly from your custom domain (e.g. hello@mycompany.com) with zero extra DNS or SPF configuration required on Sendlib. Plus, Google Workspace accounts get up to 1,000 emails/day on Free (2,000/day on Pro) per account!
Will my emails land in the inbox?
Yes, absolutely. Because the emails are sent using Google's official, highly trusted outbound mail servers, they inherit the absolute highest deliverability rates out of the box.
How does this compare to the free tier of Resend, Mailgun, or SendGrid?
Other platforms limit you to only 100 free emails per day on their free plans and require strict domain verification. With Sendlib, you can send up to 200 emails/day per connected personal Gmail account (500/day on Pro), or up to 1,000 emails/day per connected Google Workspace account (2,000/day on Pro).
Can I send attachments and CC/BCC recipients?
Yes, our REST API supports complete transactional payloads. You can specify a custom Reply-To header, carbon copies (CC), blind carbon copies (BCC), and pass an array of base64-encoded attachments.
Is my Google account password secure?
We never see, ask for, or store your Google password. Authorization is done entirely through standard, secure Google OAuth2 credentials. We only store encrypted access and refresh tokens, which you can manually revoke from your Google Account settings page at any time.