Composio gives agents hosted MCP access to Gmail and a large catalog of other applications, with managed authentication and dozens of Gmail actions. Fluxmail focuses on email, with managed Gmail OAuth, self-hosted token storage, and sixteen normalized tools across Gmail, Outlook, Exchange, and IMAP, plus REST and CLI access.
Reviewed
Choose Fluxmail when email depth, self-hosting, provider portability, and mailbox-specific access controls matter more than a broad app catalog. Choose Composio when Gmail is one integration in a much larger agent stack and you want hosted access to that broader catalog.
| Feature | Fluxmail | Composio Gmail |
|---|---|---|
| Platform | ||
| Product focus | Email infrastructure | Multi-app agent integrations |
| Standard deployment | Self-hosted | Composio-hosted sessions and MCP URLs Enterprise options advertise VPC or on-premises deployment |
| Interfaces | MCP, REST API, and CLI | MCP sessions, SDK, and API |
| App catalog | Email only | Large catalog across business apps |
| Email-provider model | One model across Gmail, Outlook, Exchange, and IMAP | Separate Gmail, Outlook, and mail toolkits |
| Tools and authentication | ||
| Current Gmail actions | 16 normalized email tools | 63 Gmail tools |
| Gmail triggers | No public trigger catalog | 2 triggers listed |
| OAuth setup | Managed hosted OAuth, bundled local OAuth, or your own credentials | Managed OAuth or your own credentials |
| Token custody | Stored encrypted on your Fluxmail host | Stored and refreshed by Composio with managed auth |
| Tool discovery | Fixed email tool set filtered by permission | Session meta tools search and load tools at runtime |
| Control and cost | ||
| Action restrictions | Named profiles or custom capability policies | Allowed tools and OAuth scopes |
| Mailbox scope | Per member and per connection | Per user session and connected account |
| Pricing | Free; Pro $15/month; Team $125/month Annual billing: Pro $120; Team $1,200 | Free; $29/month; or $229/month 20K, 200K, or 2M calls/month; pricing changes August 15, 2026 |
Composio provides separate toolkits for Gmail, Outlook, and generic mail alongside its broader app catalog. Agents may need different tools and schemas as they move between email providers.
Fluxmail provides one set of normalized email tools across Gmail, Outlook, Exchange, and IMAP. The same email model is available through MCP, REST, and CLI, so an agent or backend can switch providers without rebuilding the workflow.
Composio's managed authentication stores and refreshes connected-account tokens on its platform. Teams can supply custom OAuth credentials, but the connected account still runs through Composio's hosted service.
Fluxmail offers managed OAuth for hosted Gmail connections, a bundled local OAuth flow, or your own Google credentials. Provider tokens remain encrypted on the machine where you run Fluxmail. You choose who can access the service and which mailboxes each client can use, and Fluxmail does not copy email content to a service it operates.
Fluxmail plans are based on members and connected mailboxes. Calls run on the self-hosted instance, so searching, reading, and acting on email does not consume a hosted Fluxmail call allowance. The operator still pays for the machine and any provider usage.
Composio plans include monthly tool-call allowances across its hosted integration catalog. Higher usage may require a larger plan, and its pricing page says the plan structure will change on August 15, 2026.
We reviewed the linked product docs on July 18, 2026.
Run Fluxmail on your own infrastructure and use it through MCP, REST API, or CLI.