Yentar Labs LLC
Yentar Labs operates MailFlat, an email-infrastructure service that provides permanent, deliverable inboxes with auto-purging messages for everyday use, software testing, automation, and AI agents. Its central promise is to let code or agents create inboxes, retrieve OTPs and magic links, and send or receive real email without mock servers or shared mailbox state.
At a Glance
- Individual users needing a spare or privacy-oriented inbox
- Software developers and QA teams
- CI/CD and test-automation teams
- AI-agent and assistant developers
- +1 more
AI Tools by Yentar Labs LLC
(1)
MailFlat
Email Inboxes API for AI Agents
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Products & Services
A spare, permanent email inbox for everyday signups, newsletters and free trials. Messages auto-delete after the plan's retention window, and personal inboxes can use end-to-end encryption.
A REST API and SDK-based service for creating, listing, reading, sending from and deleting real inboxes in test suites. It supports per-test isolation and one-line OTP retrieval without a mock mail server or manual polling loop.
Agent-facing inbox tools delivered through an MCP server, Vercel AI SDK tools, LangChain tooling and a raw Agent API. Agents can create inboxes, wait for OTPs, follow magic-link workflows, read messages and send mail.
Bring-your-own-domain inboxes with DNS verification and SPF/DKIM-authenticated delivery; addresses remain permanent while messages auto-clean according to the plan.
Market Position
MailFlat positions itself between disposable-email services and enterprise email-testing platforms: unlike burner addresses, its inbox addresses persist; unlike sandbox-oriented services such as Mailtrap or QA-focused Mailosaur, it emphasizes real deliverable mail, personal encrypted inboxes, API/SDK access and AI-agent workflows. The site also contrasts it with Gmail aliases, emphasizing automation support and privacy.
Leadership
Founders
Ender Yentar
Describes himself as a solo founder building MailFlat. Public professional profiles identify him as a software engineer/AI engineer focused on agentic AI, LLMs, automation and software testing, with experience at BNY Mellon and education at Western Governors University.
Executive Team
Ender Yentar
Founder
Software engineer and AI/automation specialist; public professional profile lists BNY Mellon experience and Western Governors University education.
Founding Story
MailFlat was started around the idea that an agent or test run needs a real email account it can return to, rather than a disposable address that disappears. The initial vision combines permanent addresses with short-lived message retention, encryption for personal inboxes, and code- and agent-friendly access for OTPs, verification links and automated workflows.
Business Model
Revenue Model
Freemium subscription SaaS priced by total monthly email volume across received and sent messages. MailFlat also offers custom-contract Enterprise plans for organizations operating at 1,000,000+ emails per month; payments are processed through Stripe.
Pricing Tiers
2,500 emails per month; two-hour default message retention; 10 inboxes; one custom domain; no card required.
Volume tiers from 5,000 to 500,000 emails per month; paid plans provide retention up to 30 days, API keys, webhooks, saved inboxes and custom-domain capacity that scales by tier.
For organizations running 1,000,000+ emails per month; custom monthly volume and contract pricing.
Target Markets
- Individual users needing a spare or privacy-oriented inbox
- Software developers and QA teams
- CI/CD and test-automation teams
- AI-agent and assistant developers
- Organizations needing inboxes on domains they control
- Email verification and one-time-password workflows
- End-to-end and integration testing
- Parallel CI/CD test runs
- AI agents signing up for services and following magic links
- Temporary separation of newsletters, trials and everyday signups from a primary mailbox
- Teams operating inboxes on their own domains