Tools for developers — Email

33 match your filters — 33 of them answered our check today.

Watching this group for 20 days · how we check

This week9 new arrivals

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Doesn't mention AI15 Free9 No sign-up4 Works offline2 Open source5 Data stays with you3 No subscription1

InboxFlood

Live

Feeds a fresh inbox with real newsletter volume and engagement signals, for developers and marketers who need to warm up deliverability before running an actual email campaign.

Domain registered 3 months ago

What to know▼

How it works: Feeds a target inbox hundreds of real, independently-run newsletters daily to build genuine mail volume, then simulates opening, reading, and interacting with that mail to train the inbox's spam filter before a real campaign is sent in to see where it lands.
Best for: Cold email senders, agencies, and marketers who need to warm up a fresh inbox's deliverability before scaling a real campaign.

Watched for 9 days · last checked 3d ago

Details →

Sendbunny

Live

A self-hosted transactional and marketing email platform deployed into your own AWS account so you keep full ownership of infrastructure and customer data instead of using a hosted vendor.

Self-hosted

What to know▼

How it works: Deploy in your own AWS account; manage contacts, audiences, templates, domains, analytics
What's different: No vendor lock-in or per-contact pricing
Best for: Developers/businesses wanting a self-hosted alternative to Resend, SendGrid, Mailgun, Mailchimp, SES

Watched for 2 days · last checked 2d ago

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FreeCustom.Email

Live

Instant, no-signup temporary email aliases with rotating domains to dodge blacklists, plus a public API for developers who want to build it into their own workflows.

FreeNo sign-upData stays with youOpen source

What to know▼

How it works: Creates custom, instant temporary email aliases (any inbox name) without sign-up, receiving emails in real-time from multiple rotating domains to avoid blacklists; also offers a public API and open-source frontend.
What's different: Rotating domains to avoid blacklists, plus no popups, timers, or tracking, unlike traditional temp mail tools.
Pricing: Free.
Best for: People needing disposable email for sign-up verifications or testing, and developers who want to build disposable email into their own workflows via the API.

Watched for 14 days · last checked 8d ago

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Choji

Live

AI agents that turn Slack and Gmail requests or backlog tickets into tickets and pull requests against your own repo, then review the code — built for engineering teams already on GitHub.

Domain registered 3 months ago

What to know▼

How it works: AI agents pull context from tools like Slack, Gmail, Linear, and Jira, generate tickets grounded in your repository and team knowledge, then autonomously implement fixes and review the resulting pull requests.
What's different: Works across the tools teams already use for requests — Slack, Gmail, Granola, Intercom, Crisp, Posthog, Linear, Jira, GitHub — rather than requiring a new intake channel.
Best for: Engineering teams that want customer or backlog requests turned into shipped code without manually triaging and writing tickets.
Watch out: Claims like shipping '8x faster' and 'six-figure' savings are quoted from customers Choji says are using the product, not independently verified figures.

Watched for 13 days · last checked 7d ago

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SendFleet

Live

Transactional email API for developers that can route mail through your own AWS SES account (zero data stored on their servers) or their managed infrastructure.

Domain registered 2 months ago

What to know▼

How it works: Single REST API for transactional email, either routed through your own AWS SES account (BYOC, zero data stored on their servers) or their managed infrastructure.
Best for: Developers and teams who want data privacy and control without giving up ease of integration.

Watched for 8 days · last checked 2d ago

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FeedBlox

Live

A feedback widget for your site that captures bug reports along with console logs, network errors and stack traces automatically — built for dev teams, not a general NPS tool.

No tracking

What to know▼

How it works: A one-script-tag feedback widget for websites that lets visitors submit praise, ideas and bug reports along with automatic developer context: console logs, network errors, JS stack traces, and a click-trail repro summary. Higher plans add AI sentiment summaries, screenshots, and screen recordings, plus webhook routing to Slack or Linear.
What's different: Captures full developer debug context (console logs, failed network calls, stack traces) with every submission, aimed at dev teams rather than general NPS tools.
Best for: Development teams who want bug reports that already include reproducible technical context.

Watched for 12 days · last checked 6d ago

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Build With AI

Live

A biweekly email newsletter for engineers covering agentic engineering practices, context/harness engineering, and MCP, instead of following scattered AI hype content.

What to know▼

How it works: Publishes a biweekly Substack newsletter with one usable mental model per issue on agentic engineering, context engineering, and agent cost architecture.
Best for: Engineers building with AI who want practical playbooks instead of hype.

Watched for 7 days · last checked 6d ago

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sendthen

Live

Self-hosted, open-source email infrastructure for sending transactional email and campaigns from your own server with a developer API, instead of relying on a third-party email service.

Open sourceSelf-hosted

What to know▼

How it works: Sends transactional email, campaigns, and inbound mail from a self-hosted control plane, storing data in a single SQLite file and supporting SES, SMTP, direct MX, or a local sandbox.
Best for: Developers who want to run and own their email infrastructure rather than outsourcing it.

Watched for 7 days · last checked 6d ago

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AI Wire

Live

Scans 80+ AI research and developer-news sources every two hours and uses AI to rank what actually matters — a free, no-signup alternative to scrolling a flat news list.

FreeNo sign-up

What to know▼

How it works: Scans 80+ AI research and developer-news sources every two hours and uses a Gemini-powered curator to group stories into 8 ranked clusters with two-sentence summaries and importance scores, plus tabs for trending GitHub repos, AI YouTube channels and busy AI subreddits/Hacker News threads.
What's different: Ranks stories by importance rather than recency, so an older but significant story can outrank a fresh but trivial one.
Pricing: Free, no account, no paywall.
Best for: People who want a ranked daily digest of AI news instead of scrolling a flat feed.

Watched for 18 days · last checked 2d ago

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Markdown to Email

Live

Converts Markdown into inlined, Outlook-safe HTML you can paste into ConvertKit, beehiiv, or Mailchimp, entirely in your browser — built for newsletter writers and marketers who draft in Markdown.

FreeNo sign-upData stays with you

What to know▼

How it works: Converts Markdown into fully inlined, Outlook-safe HTML entirely in the browser, ready to paste into ConvertKit, beehiiv, Mailchimp or other email service providers, with built-in email-safe callout boxes and CTA button syntax.
What's different: Runs 100% client-side with no signup, account or paywall, so content never leaves the browser.
Pricing: Free, no signup, no paywall.
Best for: Newsletter writers, marketers and indie developers who draft in Markdown and need Outlook-safe HTML for their email platform.

Watched for 10 days · last checked 4d ago

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TanStarter

Live

A SaaS starter kit bundling auth, database, storage, blog and email for developers building on TanStack and Cloudflare — a foundation to build on, not a finished product.

What to know▼

How it works: A SaaS boilerplate for TanStack Start apps deployed on Cloudflare Workers, bundling auth, database, storage, blog, email and newsletter modules along with AI-powered features.
What's different: Deploys on Cloudflare Workers for cost-effective, fast hosting rather than a traditional server.
Best for: Indie hackers and developers who want a ready-made starter kit instead of wiring up auth, database and email from scratch.

Watched for 18 days · last checked 2d ago

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An AI agent that plans, drafts, publishes and updates blog posts on your cadence, reachable by chat, email or Telegram, with a separate offering for developers. For people who want a blog that runs without them writing every post.

What to know▼

How it works: Assigns each blog a dedicated AI agent that plans posts based on your product, audience and archive, drafts them, interlinks related content, publishes on your cadence with your approval, prepares social derivatives, and updates older posts when facts change. You reach the agent via web chat, email or Telegram; developers get a REST API, webhooks and an MCP server.
What's different: Positioned as a full blog operating system rather than just a writing tool or CMS, since the agent handles the whole content lifecycle rather than only generating drafts.
Best for: Agencies, SaaS founders, indie hackers and creators who want a blog that runs without them writing every post.

Watched for 16 days · last checked 10d ago

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IPS – Contact Form To Any API

Live

Lets Shopify merchants send form submissions to any CRM instead of manual data entry.

Watched for 1 day · last checked 1d ago

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utobo email

Live

Gives startups one dashboard for transactional email, newsletters and automations instead of juggling multiple email tools.

Watched for 1 day · last checked today

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NewsTide

Live

Lets founders and developers follow curated AI and startup news instead of wading through clickbait tech media.

What to know▼

How it works: daily feed plus a weekly newsletter digest, available in English and Spanish

Watched for 1 day · last checked today

Details →

HAI 1.0 The 1.2GB AI that outcodes GPT5

Live

A 1.2GB AI model that runs fully offline on your laptop and claims to beat GPT-5 on coding benchmarks. Open source with no subscription, built for developers wanting a local coding assistant.

Works offlineOpen sourceNo subscription

What to know▼

How it works: A 1.2GB AI model that runs fully offline on a laptop, using a neuro-symbolic architecture combining neural pattern recognition with symbolic logic for software engineering tasks.
Pricing: Open-source, no subscription.
Best for: Developers wanting a local, offline coding assistant without cloud dependence.
Watch out: The listing claims it beats GPT-5 on coding benchmarks and cites a 68.4% SWE-bench Lite score — an unverified vendor claim.

Watched for 18 days · last checked 2d ago

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PlanNEat

Live

A weekly meal planner preloaded with 800+ Indian home-style dishes, for Indian households whose global meal-planning apps don't understand Indian food combinations.

Free

What to know▼

How it works: AI weekly planning from 50+ regional Indian cuisines, roti/rice+curry+sabji combinations
Pricing: Everything free right now, no credit card

Watched for 2 days · last checked 2d ago

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Woes

Live

A developer support inbox that answers questions using your own API's actual schemas and docs, citing evidence instead of guessing.

Domain registered 1 month ago

What to know▼

How it works: unifies live chat, email, Discord and API docs testing with an AI agent grounded in workspace-scoped API context
What's different: cites its evidence or hands off to a human instead of guessing, unlike generic help desks
Best for: teams providing developer support for their own API

Watched for 4 days · last checked 2d ago

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SynCal Dashboard

Live

A unified API letting developers connect Google Calendar, Outlook, Apple Calendar and CalDAV without building OAuth, webhooks and sync logic themselves — infrastructure for engineering teams.

What to know▼

How it works: A single API to integrate Google Calendar, Microsoft Outlook, Apple Calendar and CalDAV, handling OAuth flows, webhook processing, recurring event handling and incremental sync.
What's different: Replaces weeks of building provider-specific calendar integration logic with one API.
Best for: Developers building scheduling features who don't want to build calendar infrastructure themselves.

Watched for 17 days · last checked 11d ago

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ParheliaWeb

Live

Developer API for validating email addresses in real time via syntax, domain, and SMTP checks.

Domain registered 2 months ago

What to know▼

How it works: REST API performing syntax, domain and SMTP-level email verification
Best for: developers needing programmatic email validation with code examples

Watched for 6 days · last checked 5d ago

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PoweredByAI

Live

A searchable directory of 10,000+ AI tools across writing, coding, image and video categories. Useful for browsing options, not a tool itself.

What to know▼

How it works: A searchable directory listing over 10,000 free and paid AI tools across categories like writing, coding, video generation, image creation, marketing, HR, and productivity.
What's different: Positioned as a distribution channel for AI founders: listed tools can gain organic search visibility through the directory's existing traffic and domain authority.
Best for: People browsing and comparing AI tools, and AI founders looking to list their product for visibility.

Watched for 11 days · last checked 11d ago

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Moniple

Live

Kubernetes monitoring with a mobile-first dashboard and an AI assistant that reads pod/node/log data and proposes kubectl fixes you approve — for DevOps teams tired of juggling multiple dashboards and alert channels.

FreeOpen source

What to know▼

How it works: Puts every Kubernetes cluster in one mobile-first dashboard (web, iOS, Android), with an AI Doctor that scans pods, nodes, events and logs, explains the root cause in your language, and proposes fixes with the exact kubectl equivalent.
What's different: Nothing runs until you approve; open-source agent, bring your own LLM or use Moniple AI.
Pricing: Free tier included.
Best for: DevOps engineers tired of juggling multiple dashboards and alert channels.

Watched for 13 days · last checked 10d ago

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MyTempMail – Temporary Email with OTP

Live

Generates disposable email addresses that can receive OTPs and verification codes, so you can sign up without exposing your real inbox. For privacy-conscious users and developers needing quick throwaway addresses.

Domain registered 16 days ago

Free

What to know▼

How it works: Generates customized disposable email addresses instantly that can receive OTPs, verification emails and one-time messages, keeping spam out of your real inbox.
Pricing: Free.
Best for: Privacy-conscious users, developers and testers who need a quick throwaway address to sign up for a site.

Watched for 14 days · last checked 2d ago

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Mailtree

Live

A free transactional email-sending API and SMTP toolkit for developers to plug into their own apps.

Free

What to know▼

How it works: A free email-sending API and SMTP toolkit for developers to send emails, test SMTP configurations, and integrate email features into their applications.
Pricing: Free.
Best for: Developers who need to add transactional email sending to their own apps.

Watched for 16 days · last checked 2d ago

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InboundVerify

Live

Lets your users prove they own an email address by sending a message to a unique inbox, with the result returned over API — a building block for developers, not a standalone consumer tool.

What to know▼

How it works: You create a verification task, the user sends an email to a unique address, and you get the result back through an API — no SMTP setup, verification emails, or templates required on your end.
What's different: Removes the need to build and maintain your own SMTP-based verification flow.
Pricing: Free to start.
Best for: Developers adding email ownership verification to registration, account recovery, or testing flows.

Watched for 17 days · last checked 8d ago

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PromptVault

Live

Sells pre-tested, reusable prompt packs — coding templates for Claude Code and Cursor, game-dev prompts, and marketing templates like cold email — a prompt marketplace, not an API product.

What to know▼

How it works: Sells pre-tested prompt packs across categories — developer tools (Claude Code templates, Cursor rules), game development (Godot, Unity), and marketing (cold email templates) — rather than one-off prompts.
What's different: Every prompt is battle-tested across real projects before it's sold, unlike prompts that are written once, tested never.
Best for: Developers, game developers and marketers who want ready-made, tested prompt packs instead of writing their own from scratch.

Watched for 18 days · last checked 2d ago

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SeaTicket

Live

AI agents that pull support issues from GitHub, Discourse, and email into one workspace and suggest resolutions — a support-ticket tool for teams.

What to know▼

How it works: Centralizes support issues from GitHub, Discourse, and email into one workspace; when a new issue arrives, an AI agent searches connected knowledge sources and suggests a resolution with cited sources. Issues can be turned into tracked tickets with owners, and resolved cases feed back into the knowledge base.
What's different: Combines a unified support inbox with AI-suggested, source-cited resolutions and a feedback loop that improves future answers.
Best for: Support teams handling issues scattered across GitHub, Discourse, and email who want one workspace with AI-assisted resolution.

Watched for 18 days · last checked 2d ago

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Agentic Daily

Live

A weekday AI newsletter that rates each story Breakthrough to Overhyped and tailors takeaways to your job, from consultants to developers, instead of general AI hype.

Free

What to know▼

How it works: A weekday newsletter and news site covering five core AI stories per issue, each tagged with a verdict (Breakthrough, Verified, Incremental, or Overhyped) and mapped to eight professional roles, closing with one concrete action to take that week.
What's different: Tags every story with a clear verdict and role-specific takeaway instead of general AI hype coverage.
Pricing: Free to subscribe.
Best for: Working professionals in consulting, finance, healthcare, legal, HR, dev, founder, and go-to-market roles who want a five-minute read instead of raw AI news.

Watched for 12 days · last checked 6d ago

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Knocket

Live

A connections app centered on reaching someone with a single 'knock,' per its tagline 'One Knock. Every Connection' — the listing does not specify the mechanism beyond that.

FreeOpen sourceNo ads

Watched for 18 days · last checked today

Details →

Hello, World Newsletter

Live

Learn the Art of Building Scalable and Resilient Systems

First seen today · last checked today

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SnailText

Live

Offline on-device speech to text for Mac and Windows

No sign-upWorks offlineData stays with you

First seen today · last checked today

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CheckMail1

Live

Verifies whether Gmail, iCloud, and other email addresses actually exist using browser-based login simulation.

Domain registered 3 months ago

Nothing to install

What to know▼

How it works: Uses browser automation to simulate real login attempts on Gmail, iCloud, Yahoo, Outlook, and 20+ providers, plus SMTP checks for business domains, bulk CSV upload, and API access.
What's different: Unlike verifiers that only check syntax and DNS, it can tell if a Gmail or iCloud address actually exists.
Pricing: Pay-as-you-go.
Best for: Email marketers and developers needing accurate lists.

Watched for 12 days · last checked 1d ago

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Ideya

Live

A feed of startup ideas and opportunities to explore, aimed broadly at aspiring founders, developers, students and indie hackers rather than any one group specifically.

Domain registered 1 month ago

What to know▼

How it works: A feed of startup ideas and emerging market opportunities, pulled together instead of searching manually through blogs, newsletters, Reddit and social media, with the ability to save ideas and connect with potential co-founders.
Best for: Aspiring founders, developers, students and indie hackers looking for their next startup idea.

Watched for 14 days · last checked 2d ago

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