Startup Mail
Startup Mail: Low-cost shared mail infrastructure with developer interfaces and basic team access. Ranked #30 of 30 in Shared Inbox Software by our editors (4.9/10); pricing: Paid; best for developers needing low-cost mail infrastructure.
At a glance
- Editor score4.9 / 10
- PricingPaid
- Best forDevelopers needing low-cost mail infrastructure
- Free planNo
- Paid from$1/mo
- Facts checked19 Sep 2026
Where it wins
- $1/month billed annually for the Included plan
- API, SDK, webhooks, and MCP support developer workflows
- Shared and private mailboxes with threaded search and permissions
Where it doesn't
- No advanced agent assignment automation
- Primarily standalone mail infrastructure rather than a help desk
- No free plan
Our verdict on Startup Mail
Startup Mail is a custom-domain email service for small companies, products, and AI agents. It combines web inboxes, shared and private mailboxes, and forwarding to Gmail or Outlook with secure reply relay. The product also provides developer interfaces through an HTTP API, TypeScript SDK, signed webhooks, and MCP. Teams can manage mailbox-scoped permissions and API keys, while stored drafts, scheduled sends, and DNS authentication support ongoing email operations. It is aimed at developers and teams that need direct conversations or transactional email infrastructure rather than calendars, documents, chat, newsletters, or marketing campaigns.
The paid offering is the Included plan at $1 per month, billed annually. It supports sending and receiving on a custom domain, a focused web inbox or forwarding, private and shared team access, and API, SDK, webhooks, and MCP functionality. The plan includes 1,000 monthly email events. Its mailboxes can be accessed through the web or API, with forwarding available to Gmail or Outlook and secure reply relay for responses. DNS authentication covers MX, DKIM, SPF, and DMARC, giving the plan a practical foundation for custom-domain email.
Startup Mail falls short for teams looking for help-desk workflow automation. It does not provide advanced agent assignment, so organizations needing automated ownership or routing should consider an alternative. Its primary focus is standalone mail infrastructure, which makes it less suitable for buyers seeking a broader shared inbox platform across multiple mail systems. The lack of a free plan also makes it a less suitable choice for teams that need to evaluate a no-cost tier before paying. Choose Startup Mail when low infrastructure cost, developer access, custom domains, and shared mailbox permissions matter most.
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Startup Mail pricing
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Startup Mail fact sheet
| Free plan | No |
|---|---|
| Paid from | $1/mo |
| Shared mailboxes | Not verified |
| Internal comments | Not verified |
| Collision detection | Not verified |
| Assignment automation | No |
| Mail platforms | Standalone |
| Mobile apps | Not verified |
| Deployment | Cloud |
| Platforms | Web |
| Integrations | 4 integrations: Gmail, Outlook, TypeScript SDK, MCP |
| Pricing | Paid (source) |
| Website | startupmail.dev |
| Facts checked | 19 Sep 2026 |
Startup Mail integrations
Startup Mail lists 4 integrations on its own site.
- Gmail
- Outlook
- TypeScript SDK
- MCP
Alternatives to Startup Mail
- FrontA full-service support workspace with shared inboxes, ticketing, and omnichannel tools.9.4
- HiverHiver combines collaborative email, ticketing and helpdesk features, with a 7-day trial and paid tiers.9.2
- Help ScoutA free-to-paid support platform with strong collaboration, automation, and help-center depth.9.1
See all Startup Mail alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
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