Lumbox vs AgentMail
AgentMail is email infrastructure for AI agents. Lumbox is the action layer: the same agent-owned inbox, plus the OTP extraction, browser and credential vault an agent needs to finish a signup or login on its own. Here is the honest comparison.
| Capability | Lumbox | AgentMail |
|---|---|---|
| Agent-owned inbox via API (no human OAuth) | ||
| Agent self-signup (no human, no console) | ||
| OTP / magic-link / backup-code extraction to JSON | ||
| Long-poll /otp and /wait (no webhook wiring) | ||
| Bundled stealth browser + CAPTCHA + cookie persistence | ||
| Encrypted credential vault (AES-256-GCM) + TOTP | ||
| Native MCP tools | 105 tools | 11 tools |
| IMAP access | ||
| Self-hostable | ||
| SDKs | Python, TS, CLI | Python, TS, Go, CLI |
| SOC 2 Type II | In progress | |
| Deliverability ops (dedicated IPs, suppression, spam scan) | SPF/DKIM/DMARC | Advanced |
| Free-tier email volume | 500 in / 100 out /mo | 3,000 /mo |
| Deploy marketplace | Cloudflare-ready | Vercel Marketplace |
| Paid plans start at | $9/mo | $20/mo |
Compared in good faith from public docs and pricing. AgentMail is a capable, well-funded email platform; the rows above are where the two products genuinely differ, not a scorecard.
Where Lumbox wins
- The agent provisions itself: npx lumbox signup, no human in the console.
- OTPs, magic links and backup codes parsed to JSON, returned by a long-poll /otp call.
- One key covers the whole loop: inbox, stealth browser, CAPTCHA, credential vault and TOTP.
- Self-hostable on a ~$5/mo server, and paid plans start at $9.
Where AgentMail is stronger
- SOC 2 Type II today (Lumbox is in progress), the gate for many enterprises.
- Advanced deliverability: dedicated IPs, suppression lists, spam and malware scanning.
- Higher free-tier volume (3,000 emails/mo) and a native Vercel Marketplace integration.
- A Go SDK and a larger funded team with a longer track record.
Frequently asked
What is the difference between Lumbox and AgentMail?
AgentMail is email infrastructure for AI agents: agent-owned inboxes, two-way send and receive, strong deliverability and SOC 2. Lumbox is the action layer: the same agent-owned inbox plus OTP / magic-link extraction to JSON, long-poll endpoints, a bundled stealth browser, an encrypted credential vault and TOTP, so an agent can complete a full signup or login on its own. If you need email, choose either; if you need the agent to finish a login, choose Lumbox.
Can an AI agent set up its own email without a human, on Lumbox or AgentMail?
With Lumbox, yes. POST /v1/orgs is unauthenticated and returns an API key, wrapped as npx lumbox signup, so the agent provisions its own inbox with no human step. With AgentMail, a human creates the account and copies an API key from the console first.
Does AgentMail extract OTP codes for agents?
AgentMail delivers the full inbound email over webhooks or websockets in real time, but it does not extract the OTP itself, you parse the code out of the message. Lumbox returns the OTP, magic link, backup code and expiry as clean JSON, and a long-poll /otp endpoint blocks until the code arrives.
When should I choose AgentMail instead of Lumbox?
Choose AgentMail when you need SOC 2 Type II today, high free-tier or cold-send outbound volume with advanced deliverability (dedicated IPs, suppression lists, spam and malware scanning), a Go SDK, or native provisioning inside the Vercel Marketplace. AgentMail is the more established, better-funded email-infrastructure choice.
How do Lumbox and AgentMail pricing and free tiers compare?
Lumbox free is 3 inboxes with 500 inbound and 100 outbound emails a month and bundles OTP extraction, IMAP, the credential vault and MCP tools; paid starts at $9/mo and adds browser automation and TOTP. AgentMail free is 3 inboxes and 3,000 emails a month combined; paid starts at $20/mo. AgentMail offers more raw email volume; Lumbox bundles the full signup-and-login stack at a lower entry price.