Dev tools · alternatives · 2026
24 alternatives to MailSlurp
Test, build & automate email and SMS
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. MailSlurp launched in 2024; newer entries below may have overtaken it.
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inbound ▲227Hey HN! I've been working on Inbound (inbound.new) - an email system that lets you programmatically manage email addresses and route them to AI agents, webhooks, or forward them anywhere. The core idea: instead of manually managing email addresses, you create them on-demand via API and route incoming emails to your AI agents or other automated systems. For AI Agents: Create [email protected] and emails get sent to your AI agent as webhooks. Your agent can reply using our SDK. Perfect for AI customer support or automated responses. For Email Forwarding: Set up [email protected] to…
2025 · inbound.new · its alternatives →
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MailTester.AI▲327Forward an email and get an AI deliverability report in 30s
2025 · mailtester.ai · its alternatives →
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Automate email and SMS tests using any language or framework
2020 · mailosaur.com · its alternatives →
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The AI email writer that Google wishes they built
2024 · chromewebstore.google.com · its alternatives →
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Sequences, drips & onboarding emails from PH's favorite CRM
2020 · salesflare.com · its alternatives →
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Square Marketing▲197Drag & drop email marketing and automation from Square 💌
2019 · squareup.com · its alternatives →
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Auto-Gmail▲132AI to draft answers to all your inbound emails
2023 · tinymagic.app · its alternatives →
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Hey HN, we're Haakam, Michael, and Adi. We're building AgentMail (https://agentmail.to/), an API to give AI agents their own email inboxes. We’re not talking about AI for your email, this is email for your AI. We started building email agents because they can converse with users in their inboxes, automate email-based workflows, and authenticate with third-party applications. Given these unique capabilities, we think email will be a core interface for agents. But we were building on top of Gmail, which was a struggle: poor API support, expensive subscriptions, rate limits,…
2025 · chat.agentmail.to · its alternatives →
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Auto Gmail▲82Let AI draft answers to all your inbound emails
2023 · chromewebstore.google.com · its alternatives →
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SMTP‑Test.com▲103One‑click SMTP server test with real‑time protocol logs
2025 · smtp-test.com · its alternatives →
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EmailTemple▲78The AI studio for creating high conversion, on-brand emails
May 2026 · emailtemple.com · its alternatives →
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Create High-Converting Emails in Just 5 Minutes with AI
2025 · incred.email · its alternatives →
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Hi HN! We're a 5 person team working on simplifying the creation of email apps. Right now, most email services focus on outbound emails (newsletters, transactional, delivery), but that doesn't solve the fact that we all hate receiving them. You can try it at https://mailscript.com Mailscript lets you create programmable email addresses. It works headless, via the CLI, API (we use Swagger to support most languages). You can even run it as a daemon on a server (to run functions when emails arrive). Once you get [email protected], you can create as many aliases as you'd like…
2021 · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →