Sim· AI agent builder
Platform to build, deploy, and manage agents
What is Sim?
Sim is an AI agent builder.
Sim is an open-source platform for building and deploying AI agent workflows, used by over 100,000 builders with 30,000+ GitHub stars. You build agents on a visual canvas by connecting models, tools, logic, and data, with 100+ integrations and support for every major model provider. Workflows deploy as a REST API, scheduled job, webhook, chat interface, or MCP server. Most workflow tools were built for deterministic automation and had AI added later, while Sim was designed for agents from the start. It's Apache 2.0 licensed, so you can self-host the whole platform, and the free tier is fully functional rather than a limited trial.
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FounderPlaybooks.
What other founders did to grow.
2722 dispatches from hundreds of founders, pulled from the week's best podcasts.
I think just in general people over rotate on negative comments more than they do on positive and I think that's what throws a lot of Developers for a loop.
Founders Over-Rotate on Negative Comments — Track the KPI Numbers, Not the Noise
Qualitative complaints are loud and emotionally salient. Conversion rates, retention, and LTV are quiet but accurate. The steadiness to hold both simultaneously — reading the data without being swept away by individual complaints — is what separates operators from reactive builders.
an app that actually reminds you at the end of the month what your usage was and aligns that with what your next recurring billing cycle should be... if someone's battery is almost dead you can then see like well let's give them an offer they can't refuse
Battery triggers and usage summaries make upsells feel helpful
Two high-converting upsell triggers that feel like service rather than a sales push: (1) an end-of-month usage summary showing which tier the user actually needs, with messaging like 'switching to the higher tier this month would have saved you X'; (2) a contextual paywall triggered when the user's battery is nearly dead — a high-urgency moment when decisions happen fast. Both reframe the upsell as solving the user's problem.
There's a play for whatever you're stuck on.
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Comments
1Hey! We are excited to go live on betterlaunch! Please check us out at Sim.ai!