Letterkeel vs feedsmith Send Email: sending email from Apify runs and AI agents
How do I send email from an Apify run or an AI agent with my own domain?
Both Actors below send through your own provider, so mail comes from your domain with your deliverability and logs. Letterkeel supports SMTP, Resend, SendGrid, Mailgun and Postmark, mail merge from datasets, result digests with CSV, attachments and per-recipient status at $0.001 per accepted recipient (failures free). The other attaches the run's dataset as CSV or JSON and charges per email plus per 1,000 attachment rows.
Letterkeel: Email anyone from your runs, apps and AI agents
$0.001 per email sent, failures and dry runs freeYour own SMTP, Resend, SendGrid, Mailgun or Postmark account
Runs on your own Apify account, pay per result; failed results are not charged.How we compared
- Price per email from Apify's pricing API today
- Providers supported
- Attachments and merge
Side by side
| What buyers compare | Letterkeel (CyberMax) | feedsmith Send Email |
|---|---|---|
| Price (live from Apify) | $1.00 per 1,000 (email sent) | $2.00 per 1,000 (email sent); $0.001 per 1,000 attachment/preview rows |
| Providers | SMTP, Resend, SendGrid, Mailgun, Postmark | SMTP, Resend, SendGrid |
| Attachments | Yes, plus CSV digests | Run dataset as CSV/JSON |
Sources: Letterkeel (our live page) · feedsmith Send Email (checked 2026-10-26).
The options and their published prices
| Option | Published price | Notes | Source |
|---|---|---|---|
| Letterkeel (CyberMax) | $1.00 per 1,000 (email sent) | Your own SMTP, Resend, SendGrid, Mailgun or Postmark account; Mail merge from any dataset; result digests with CSV; Attachments and per-recipient status | Our page |
| Send Email (feedsmith/send-email) | $2.00 per 1,000 (email sent); $0.001 per 1,000 attachment/preview rows | Pick it if you mainly attach a run's dataset to a notification | Their page |
Rival prices as shown on each seller's own page (Apify Actors: Apify's public pricing API), checked 2026-10-26. Prices change; check the seller's page before buying. Options whose price we could not confirm on that day are left out.
Where the alternatives are better
- Send Email (feedsmith/send-email): Built around attaching the run's dataset to a notification email.
Which one should you pick?
Choose Letterkeel if
- you use Mailgun or Postmark
- you send personalised mail merges from a dataset
- you want per-recipient results back
Choose feedsmith Send Email if
- you mainly attach a run's dataset to a notification
What Letterkeel includes
- Your own SMTP, Resend, SendGrid, Mailgun or Postmark account
- Mail merge from any dataset; result digests with CSV
- Attachments and per-recipient status
- Callable from webhooks and AI agents
- Failed sends and refused recipients are not charged
Questions
How do I send email from an Apify run or an AI agent with my own domain?
Both Actors below send through your own provider, so mail comes from your domain with your deliverability and logs. Letterkeel supports SMTP, Resend, SendGrid, Mailgun and Postmark, mail merge from datasets, result digests with CSV, attachments and per-recipient status at $0.001 per accepted recipient (failures free). The other attaches the run's dataset as CSV or JSON and charges per email plus per 1,000 attachment rows.
Can I send cold email with it?
Only within the law and your provider's rules (consent, opt-out, a real sender). It is a sending tool, not a list source.
Letterkeel: Email anyone from your runs, apps and AI agents
$0.001 per email sent, failures and dry runs freeEmail anyone from your runs, apps and AI agents
Runs on your own Apify account, pay per result; failed results are not charged.Free how-tos
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