Mailwarm 2.0 (YC S20)
Most founders rely on email to grow, but emails don’t land in the inbox by magic. Mailwarm 2.0 is the premium email warmup and deliverability system built to give your emails the best chance of reaching the inbox. It combines automated warmup, real engagement, monitoring, infrastructure checks, and experts call available for every subscriber.
Astra Autonomous Pentest
Astra Autonomous Pentesting makes self-healing software the new standard, a category we’re defining after 8 years and 5,000+ real-world pentests. An army of offensive pentesters and bounty hunter agents that discovers complex chained vulnerabilities, an independent validator layer drives false positives to near-zero, and AI-fix agents deliver remediation as native Cursor, Copilot, and Claude Code prompts. The reactive pentest era is over.
Deliveryman.ai
Deliveryman.ai automates the hardest parts of cold email infrastructure mailbox setup, DNS records, warmup, email verification, sending systems, blacklist monitoring, reply management, and routing. Instead of spending weeks setting up your own cold email infrastructure and fixing deliverability issues, you can launch faster, scale confidently, and focus on what actually drives revenue. No G-suite required. Warmup, email list verification, Blacklist monitoring, etc. all included in one tool.
Build Club Campus
Build Club Campus is a fun, gamified and community-driven virtual AI school for learning AI by building with it. Static courses get old fast in AI, so Campus helps you stay current through bite-sized courses, real projects, role-based use cases and community templates that evolve with the tools. Earn certifications in OpenAI, Claude, Copilot and more, and become great at AI fast - for work, startups or side hustles. It’s 100% free, as part of our mission to enable anyone to build with AI.
Google Gemma 4 12B
Gemma 4 12B processes text, vision, and audio natively without separate encoders, running on 16GB VRAM. For developers building local agentic applications who need multimodal capability without cloud dependency.
Empromptu AI
Most AI apps launch on someone else’s model and stay there forever. Empromptu AI turns live AI features into custom models you own. As your app runs, Empromptu AI captures real-world usage, human corrections, and edge cases from live AI workflows, then uses that signal to train a custom model you own. Improve accuracy, lower inference costs, and stop depending forever on rented intelligence from the same providers moving into your category.
Keen Code
Keen Code is an open-source, context-aware and efficient CLI coding agent written in Go. Three aspects stand it out from other similar products: - It was built from scratch by coding agents, with the full prompt/design trail preserved and shared in the repo. - It uses turn memory to keep multi-turn sessions lean which saves context significantly. - It maps MCP servers to lazy-loaded Skills instead of stuffing large schemas into context upfront. This again saves context in mult-MCP setting.
Perplexity Personal Computer for Windows
Personal Computer extends Perplexity's multi-model agent system to your Windows machine, running tasks across local files, native apps, and the web for Max and Enterprise Max subscribers on the waitlist.
AppWizzy
AppWizzy gives you a private VM with Codex installed where you build, run, and host production web apps by chatting with AI. Your code is yours, the workspace persists, and the app lives in the same environment where it was created. Pay only for AI usage, hosting days, and optional templates
TimeTuna.com
If Calendly was for people who care about design. We help founders, freelancers, and studios create a memorable impression on their prospective clients through booking pages with beautiful video backgrounds. Your video, your domain, your taste. You have a character. Let you booking page have a character too. Free to start, $10/month for the rest.
Gather
Easily find any design references! Gather is your second brain for visual inspiration — save screenshots, photos, and links, then search them the way you'd describe them to a friend: "that muted retro car ad."
Intelligent Terminal
Intelligent Terminal is an open-source experimental fork of Windows Terminal with native agent integration. It adds an agent status bar, context-aware agent pane, automatic error detection, session management, and command palette prompts for ACP-compatible agent CLIs.
Extella.AI
Extella is an agentic AI platform that self-evolves. It remembers what works and reuses it, so each task runs faster and cheaper. That memory lives in four layers: Rules adapt to you, Concepts build a knowledge base, Experts turn work into automations, and a KV store keeps your keys encrypted. Bring your own LLM, connect any tool (Slack, Notion, Gmail, GitHub), any GitHub library, ML model, or your own — all managed from a single workspace. By Day 30, it's a system only you have.
Chloe by Close
Other AI agents bolt onto your CRM, but Chloe is built into it. Chloe calls leads, replies to emails, enriches contacts, takes notes, and updates Close the second anything changes. No extra seat, no commission, no integration to babysit. Chloe isn't a tool you add. It's like adding 20 salespeople who never sleep, directly in your CRM. Chloe works across your entire sales motion — but her voice is where she really goes to work. Hear Chloe sell now.
Audex Trace
Audex Trace is a Mac mini player for Apple Music that shows what is actually playing in real time: codec, bit depth, sample rate, and output match status. It also shows Playing Next, estimates upcoming queue quality, and warns about tracks that may skip or fail before they interrupt playback.
Sun
Sun is a voice first AI model built specifically for real‑time collaborative voice interaction, not just one‑on‑one chat. ChatGPT Realtime and Gemini Live were built for one user talking to AI. Sun is built for collaboration — meetings, group calls, multi-agent debates, classrooms. One API, multi-speaker awareness, 10× the context window.
Cignara
Cignara provides enterprise grade AI agents that handle end to end customer conversations over voice and chat. Built with strict policy governance, our agents reason within your specific business rules to deliver verifiable, completely hallucination free actions. Backed by Y Combinator. Trusted by Fortune 500 companies like LG.
Kai for Chrome
Kai transcribes & summarizes your Meet, Zoom, and Teams calls 100% on-device. Press ⌘⇧K, get a clean summary + action items the moment the call ends. No account, no upload, no meeting bot in the room. First Chrome extension running Whisper Base fully locally via WebGPU + WASM. No cloud STT, no API call, no signup. Free forever. Built by Morgen as the entry point to Kai, our AI executive assistant.
Smart Runner
Smart Runner builds an adaptive 5K-to-marathon plan from one race result and rebuilds it after every run. Paces come from your VDOT, load tracking is the usual ATL/CTL/TSB, and workouts follow Pfitzinger, Daniels and Canova. Native Apple Watch app with live pace and HR zones. Two things make it different: it's a one-time purchase, not a subscription, and it runs entirely on-device. No account, no server, nothing leaves your phone. 14-day free trial.
Boxes.dev
Cloud dev environments for agentic coding. Run each Claude Code or Codex chat on its own computer in the cloud, connect from mobile and desktop, and code from anywhere.