The bolt.new vs 21st.dev question comes up often in Developer Tools circles. Here's what the launch data says. No opinions from us, just metrics and category overlap.
Side-by-side comparison of bolt.new and 21st.dev based on community engagement data.
Prompt, run, edit & deploy full-stack web apps
Github + Pinterest to make your AI websites look beautiful
The bolt.new vs 21st.dev question comes up often in Developer Tools circles. Here's what the launch data says. No opinions from us, just metrics and category overlap.
| Category | bolt.new | 21st.dev |
|---|---|---|
| Artificial Intelligence | Yes | - |
| Design Tools | Yes | Yes |
| Developer Tools | Yes | Yes |
| GitHub | - | Yes |
| Open Source | - | Yes |
Hi y'all - cofounder/CEO of StackBlitz (creators of bolt.new) here, excited to share what we've been up to on Product Hunt today! tldr: Imagine if AI dev products (Claude, v0, etc) let you install packages, run backends & edit code — that's bolt.new . And it's pretty darn slick: - Prompt, edit, ...
the zero-setup angle is underrated. most people underestimate how much friction "clone the repo, install dependencies, configure env vars" adds for non-technical users. removing that entirely is a big deal. the WebContainer approach is interesting technically too. running a real dev environment in t...
I exhausted my trial tokens in record time. Is there an annual coupon?
The API's responsiveness is impressive—getting polished components with minimal latency enhances productivity. Pairing it with tools like Apidog has further optimized my development process.
@serafimcloud Amazing product! I am not much of a UI developer, but I was able to build pretty sleek product website for our product using @21st.dev & @Windsurf at a pretty quick time. Love to see you guys launch on Product Hunt. Good luck!
Just discovered 21st.dev and it's a total game-changer for my workflow! As someone who straddles the line between design and engineering, this platform feels built exactly for people like me. The ability to discover, share, and craft UI components with other design engineers has already saved me hou...
bolt.new leads on raw interest score. 21st.dev leads on engagement ratio. That split is worth paying attention to. bolt.new attracted more initial eyeballs, but 21st.dev's audience engaged deeper. For most buyers, engagement ratio is the better signal.
These products share 2 categories: Design Tools, Developer Tools. Moderate overlap suggests they target related but distinct use cases.
bolt.new is also tagged in Artificial Intelligence, which 21st.dev isn't. That suggests bolt.new positions itself more broadly or targets an adjacent audience.
21st.dev has unique category tags in GitHub, Open Source. Different positioning can mean a different buyer profile, even within the same space.
bolt.new launched Oct 2024. 21st.dev launched Jan 2025. bolt.new has had more time to iterate and build a user base. 21st.dev had the advantage of launching into a more defined market with clearer user expectations.
bolt.new has a 0.07 engagement ratio (below average), based on 92 discussion threads across 1,242 interest points. Low engagement relative to interest means the launch attracted clicks but not conversation. Could indicate the product appealed to a broad audience without hooking anyone deeply.
21st.dev has a 0.11 engagement ratio (below average), based on 136 discussions across 1,233 interest points. The low ratio suggests a launch that got attention but didn't convert that attention into sustained interest.
Within the Design Tools category (3,033 total products), bolt.new ranks #6 and 21st.dev ranks #8 by interest score. bolt.new sits in the top 10 for the category.
bolt.new is in the top 0% of Design Tools by interest. 21st.dev is in the top 0%.
Pick bolt.new if you want the product with the larger community behind it; you value stability and a longer track record; you need something that also covers Artificial Intelligence.
Pick 21st.dev if community size matters less to you than engagement depth; sustained discussion and active users are your priority; you prefer newer tools with fresher tech; you need something that also covers GitHub.
bolt.new: With bolt.new you can prompt fullstack web applications into existence, see them executed in real-time, debug errors as they occur & deploy a fully functional app—all without ever leaving your browser or personally writing a single line of code!
21st.dev: Make your AI websites look professional & beautiful. Copy-paste UI into v0, Cursor, Bolt, Lovable, Replit from the largest marketplace of UI elements. Get inspired by 50+ pro design engineers. Publish your design engineering work
These products also compete in the Design Tools, Developer Tools categories:
Sivi AI — Generative AI to magically turn text to visual designs (Interest: 937, Engagement: 0.30)
Pythagora 2.0 — World's first all-in-one AI dev platform (Interest: 697, Engagement: 0.08)
Face Generator — Generate unique, expressive AI-generated faces in real time (Interest: 508, Engagement: 0.15)
Product Video Examples — Learn from the best product videos on the internet (Interest: 438, Engagement: 0.19)
liblab — Generate better SDKs for your API (Interest: 428, Engagement: 0.33)
Uploadcare File Uploader — Take a shortcut to scalable and secure file uploads (Interest: 390, Engagement: 0.29)
Comparisons are generated automatically when two products have enough data overlap. If the pair you want isn't here, the products might be in different categories or too far apart in engagement.
Either the product didn't meet our engagement threshold, or it doesn't share enough category tags with the other product to generate a meaningful comparison. We'd rather show no comparison than a misleading one.
Each product's data reflects its launch period. The comparison shows both products' engagement metrics from when they launched. The build date at the bottom of the page shows when the index was last refreshed.
Not yet. Current comparisons use launch-period data only. Post-launch tracking is on our roadmap.
Generally, yes. Engagement ratio is hard to fake. A product can generate artificial interest, but sustained discussion threads require people who actually used the product and had something to say about it.
Automatically. We compare products that share at least one category and have similar interest scores. Products too far apart in traction don't make for useful comparisons.