Startup Resources

insideout: know AI inside out

Short interactive lessons in AI and quant engineering, for engineers. Free to start.

Type.com | Turn agent automations into company-wide workflows

A managed-agent platform. Deploy Claude, Codex, or ChatGPT automations to managed cloud machines on schedules, webhooks, or events, with team permissions.

See which tenders fit your company | Polytender

Polytender matches public tenders to your business and emails you new ones daily, from official procurement sources across Europe, the UK and the US.

boat: Cheapest, Most Powerful Sandboxes for Agents

Persistent Linux VMs for AI agents with SSH, Docker, and fast fork. Billed per second, free when stopped. 7-day free trial, then from $20/mo.

Ferryman: Social Media Cross-Posting & Scheduling

Create, schedule, and automatically sync social media posts, including featured Twitch Clips, across supported platforms.

tinyjs — desktop apps for macOS, Windows, and Linux in ~6 MB

Build macOS, Windows, and Linux desktop apps in JavaScript: txiki.js backend, native webview window, ~6 MB shipped. No Electron. No ports.

Longlist — Design studios and designers worth knowing

Studios, independent designers and type foundries from around the world — a working longlist for your next collaborator or employer.

MCP Explained: how the Model Context Protocol works

Every MCP message on the wire, step by step. Transports, auth, tools, sampling, tasks, tool search and codemode. By Runlayer.

Rewind VM: deterministic Linux VMs you can scrub, rewind and fork

Rewind VM runs a Nix build, a test suite or any Linux command inside a deterministic KVM virtual machine. Scrub the run back to any step, attach gdb there, and fork it with a new seed.

Cosign

A curated professional network where people endorse founders, builders, and startups, with shareable lists, an industry news feed, and job listings.

unfair.so — 1000+ creators. First post today.

Creators your buyers already follow. Pick them by their real audience, launch in hours, and keep every engager as a lead.

OpenSEO - Open Source SEO Platform

OpenSEO is the open source alternative to Ahrefs and Semrush. Keyword research, backlinks, rank tracking, and site audits, billed by usage instead of a $100-plus monthly subscription. Self-host it free, or connect it to your AI agents over MCP.

HackerTube

The YouTube videos that Hacker News keeps telling each other to watch.

ZeroMark

Organise and search your X bookmarks; every keep and discard becomes taste that Claude, ChatGPT and Gemini can read.

Vitals

An Activity Monitor alternative for Mac: CPU, GPU, memory, disk, network and energy per app, with up to a year of history.

MailCheap

Newsletter sending priced by the emails you send, not by dormant subscribers, from $19 a month.

Founder Profiles

A library of biographies on the formative years of notable founders, from Silicon Valley and beyond.

opencommerce

Lets AI agents buy from any online store through one endpoint – catalogue search, checkout and order tracking in one SDK.

Rankhog

Finds Reddit buyer threads in real time and warms up accounts you own, to rank on Google and ChatGPT.

MediaBoost

Press release distribution to 500+ outlets, including Yahoo Finance, Business Insider and AP News.

Figcel

Turns your store’s website link into ready-to-post Instagram carousels and Meta ads, with copy, in your brand’s own look.

Pocketsflow

Sell digital products, courses, memberships and software from one store, with checkout, global tax and payouts handled and no monthly fee.

EasyUI

Animated UI components built with React, Tailwind CSS and Framer Motion.

SortUI

A design system on shadcn/ui: React components with live examples, a matching Figma UI kit and 180+ landing sections.

Rainbrand

Builds and maintains your brand’s identity, guidelines and assets as shared context for AI agents.

Mixture

A video editor with motion design built in, where Claude, Codex, Cursor or any MCP agent can edit the same document alongside you.

Nevo’s Brain

A free MCP server that gives your AI agent the distribution playbook behind Postiz: finding niches, catching hypes, picking channels and growing revenue.

devl

Free components, blocks, screens, motion and illustrations on coss ui – copy the source or install with the shadcn CLI.

Bazzly

Finds Reddit users who have shown interest in what you sell and replies to or DMs them, with you kept in control.

dotstore

A curated, ranked store of web apps – productivity, design, AI and developer tools – that open in any browser.

frontrun

AI deal sourcing that tracks what top investors and founders follow and surfaces startups before their round, with drafted founder outreach.

MiroFish

An open-source swarm-intelligence engine that simulates thousands of agents to forecast outcomes, from markets to public opinion. AGPL-3.0.

ruks.org

A catalogue of 1,000+ designers, illustrators, photographers and studios, from firms to individual contributors.

Clanker UI

React components for AI agent interfaces: agent runs, tool calls, approvals, chat and voice. Built with Tailwind and Base UI.

FirstIndex

Done-for-you SEO and AI search visibility for software companies, shipping one change to your site every day.

Seth Godin's Book Recommendations

Books Seth Godin has recommended, each with his words and a link to the original source. An independent tribute.

Pulse

Live view of everything your computer is doing: processors, memory, graphics, disks, network, energy and every process. For Mac, Windows and Linux.

Hatch

Company formation, accounting and finance teams across six jurisdictions, handled by one team.

Warmbly

An open-source cold email platform: mailbox warm-up, campaigns and reply triage, hosted or self-hosted.

What product looks like when coding is solved

Ramp's CPO Geoff Charles on Lenny's Podcast: how product work changes once code is cheap to write.

How to scale intent, quality and artistry with AI

Stripe's Katie Dill on Lenny's Podcast: keeping craft and quality high as AI does more of the building.

Scrapling

An adaptive Python web-scraping framework, from a single request to a full-scale crawl. BSD-3-Clause.

Kronos

An open-source foundation model for financial market data. MIT-licensed.

Agent-Reach

Gives AI agents read and search access to Twitter, Reddit, YouTube, GitHub and more through one CLI, with no API fees. MIT-licensed.

Unlimited-OCR

Baidu's open-source OCR model for parsing long documents in a single pass. MIT-licensed.

REA

Reverse-engineer apps, binaries and browser behaviour with your coding agent, through a CLI and MCP.

design.how

Design systems written for AI agents, so the products they build keep a consistent taste.

mrkr

Cookieless web analytics with session replay, funnels and revenue attribution, in under 6 kB.