ReacherX is an open-source platform for finding the people you're looking for on X/Twitter and LinkedIn. Unlike tools like Apollo, which pull from a static prospect database, ReacherX runs live searches against current data, so results can be very recent, and it's built for people who aren't salespeople and don't want to learn sales jargon or campaign/sequence tooling.
Ideal use cases include finding potential customers, market research/validation before building something, and finding ideal candidates when hiring.
I built it because even in 2026, finding the right people/network isn't easy. One question always boggled me: why can't I just describe the people I need in plain English and see a list of people along with the actual sources/evidence showing why they are the right match? After three years in this space, I've also come to think this is less of a funnel problem and more of a networking problem, and the space is pretty closed, which is one reason I wanted ReacherX open source.
The workflow is roughly: - Describe who you're looking for and why. - The Agent creates ideal profiles and example mock profiles for you to review. - It continuously searches X/Twitter and LinkedIn using generated search queries. - Each person is qualified with an LLM and enriched with supporting sources/activity and other details. - ReacherX only surfaces people with a match score of 70% or higher. - At 90%+, it can generate an outreach plan for review. - DMs, replies, liking/commenting, profiles, voice notes, and media attachments are built in.
You can ask the Agent to handle outreach, or do it yourself through the UI. Everything runs through your own account under configurable rate limits. I've tried to keep it conservative to avoid platform flags, but this is an area I'm still refining and take seriously.
It has memory and adapts based on search performance and your feedback/preferences.
The searches run in the backend, so the browser can be closed. First results usually take around 5 to 30 minutes, and the workflows keep running until plan limits are reached or a backend error stops them.
I ran it for 2 to 3 weeks while looking for potential customers. It processed 50,000 people, but only around 300 scored 70% or higher and were surfaced to me.
It's an end-to-end TypeScript project using Next.js and Convex. ReacherX uses Convex Agent, Workflows, Workpool, Memory/RAG, etc. Those durable workflows are the backbone of the system. ReacherX is also part of the Convex Open Source program.
One thing I'm still thinking hard about is how this architecture will hold up at scale. At a high level it's a continuous loop: generate queries -> search platforms -> qualify/disqualify results with an LLM -> enrich matches -> keep searching.
Another challenge has been social-data APIs. Before X introduced Pay Per Use, its API was prohibitively expensive for this kind of product, and even now it can still be costly. Third-party APIs made it possible for me to build this at a much more reasonable cost.
ReacherX is currently in beta (v4), so expect some bugs and rough edges. I'm working on it daily. The hosted product is paid and doesn't have a free tier yet. If you don't want to use the hosted version, you can self-host it. I'm also open to contributors and bug reports on GitHub.
I'd especially love feedback on the idea, match quality, architecture/scaling approach, and product philosophy. Anything is welcome :) Demo and background links in the first comment.