Mails.ai vs Mystrika

Mails.ai provides email infrastructure and an API for AI agents to send, receive and parse transactional or conversational email. It is available on the web and through an API, with REST, webhooks, an MCP server, and TypeScript and Python SDKs. Inbound replies arrive as structured payloads containing sender, subject, body, headers and attachments, as well as an injection score and sender reputation. All plans scan inbound messages for prompt injection; optional classification can extract intent, entities and urgency for $0.003 per inbound. Listed integrations include Claude Code, Cursor, Cline, Continue, Windsurf, OpenAI Agents SDK, Anthropic SDK, LangGraph, Mastra, Vercel AI SDK and Pydantic AI. The maker describes the product as early, live and self-serve, and says the API refuses cold outreach. Free costs nothing for 3,000 events and one agent. Pro is $20 a month; Scale is $99 a month. Sends stop at a plan's monthly cap; excess inbound replies are stored but not scanned or sent to the webhook. The maker says it lacks SOC 2 today and does not include HIPAA in Phase 1 scope.

Mystrika is a web-based cold email operating system for agencies, sales teams, and recruiters. It combines AI-personalized outreach, sequenced follow-ups, warmup, email verification, inbox rotation, and reply tracking. Its Unified Inbox brings replies from email IDs, campaigns, and prospects into one workflow. Mystrika supports IMAP, SMTP, and OAuth providers, connects with Gmail and Outlook, and integrates with Salesforce, HubSpot, and Pipedrive through webhooks and API. Warmup is unlimited, with six types and seven languages, but is limited to 100 warmup emails per address each day; campaign sending is limited to 50 emails per sending address each day. Account limits include 10 email IDs per domain and a soft limit of 299 warmup IDs. Mystrika says it enforces GDPR, CAN-SPAM, and CASL requirements and reports SOC 2 compliance, end-to-end encryption, and regular security audits. A free plan is available; paid plans start at $16/mo (annual).