socket.help vs Mailosaur
Mailosaur is a paid email and SMS testing service with a 14-day trial. socket.help is free to start and gives AI agents real inboxes over a hosted MCP server, with one-time codes and links extracted, plus webhook URLs, mock APIs, 2FA codes and approvals.
Why teams pick socket.help.
Pick socket.help when you want to start free, connect an AI agent over MCP, or test email together with webhooks and mock APIs.
- You want to start free, not with a trial
- An AI agent reads the email over MCP
- You need 2FA codes on a free plan
- Webhooks and mock APIs are part of the same test
Mailosaur fits QA teams that need real-device email previews or SMS testing today.
- You need real-device previews
- You need SMS testing today
Every socket.help plan includes webhook and email inboxes, mock APIs and MCP servers, files, memory, monitors and approvals for AI agents over one MCP connection, plus 170 tools in all. Free to start; Pro is $2 a month.
The differences that matter.
| Area | socket.help | Mailosaur |
|---|---|---|
| Getting started | Free plan; webhooks, mocks and utilities need no account. | 14-day trial, then a paid plan. |
| Price | Pro is $2 a month. | Personal is from $20 a month and Core from $50 a month, billed annually. |
| Built for agents | Hosted MCP server with codes and links extracted for every message. | No official MCP server. |
| Beyond email | Webhook URLs, mock APIs and OAuth, monitors, memory and approvals. | SMS testing as an add-on, and a TOTP authenticator on Core and above. |
| 2FA codes | TOTP authenticators on every plan, including Free. | Virtual authenticator on Core and above. |
Good to know.
socket.help does not offer device previews or SMS yet; phone numbers are planned.
You can start without an account, and a free account keeps resources for up to seven days. See the published allowances for storage, rate limits and retention.
Frequently asked questions
Is Mailosaur free?
No. Mailosaur offers a 14-day trial, then plans from $20 a month billed annually. socket.help has a free plan, and Pro is $2 a month.
Does Mailosaur have an MCP server?
Mailosaur does not list an official MCP server. socket.help is a hosted MCP server for email, webhooks, mocks, 2FA codes and approvals.
What is a cheaper alternative to Mailosaur?
socket.help gives you real email inboxes with extracted codes and links, TOTP authenticators and webhook inboxes, free to start and $2 a month on Pro.
Check the sources.
Reviewed on against official documentation. Features can change. This page is written by socket.help and is not an endorsement by Mailosaur.