simstudioai/sim

Sim is the collaborative workspace to build, deploy, and monitor AI agents and workflows. Used by 100,000+ builders.

29.8k stars · 3.9k forks · TypeScript

Caution

Caution: one person wrote most of the recent commits.

Why

One person wrote 73% of human commits in the last year, so the project depends on them continuing. (source 1, source 2)

What would change this

A second person takes a substantial share of commits.
Partly checked: maintenance (Commit counts are estimated: the commit sample stops before the window start, so GitHub's totals were scaled by the sampled bot share.; Authors in the last 90 days are counted from the sampled commits only.)

Maintenance

Partial

Active

Human commits, 30 days: 969
Human commits, 90 days: 2.6k
Human commits, 365 days: 6k
Bot share of commits, 365 days: 0%
Last commit: Oct 13, 2026 (1 day ago)
Last human commit: Oct 13, 2026 (1 day ago)
Authors, 90 days: 5
Last release: Oct 13, 2026 (1 day ago)
Median PR merge time: under an hour

Responsiveness: of 22 recent issues, 45% got a maintainer reply. Median first response: 37 hours.

Commit counts are estimated: the commit sample stops before the window start, so GitHub's totals were scaled by the sampled bot share.
Authors in the last 90 days are counted from the sampled commits only.

Sources: Commits, Releases, Merged pull requests, Issues

People

Complete

Owner: Organization
Commits sampled: 499 since Oct 14, 2025
Authors for half of commits: 1
Authors for 80% of commits: 2
Contributors: 53

Top committers

waleedlatif1: 73% of commits
icecrasher321: 19% of commits
TheodoreSpeaks: 5% of commits
BillLeoutsakosvl346: 2% of commits
mzxchandra: 2% of commits

Shares come from the newest sampled commits, since the commit sample is capped.

Sources: Commits, Contributors

Stars

Complete

Organic, confidence high

Bars show stars gained each week. Orange bars overlap a burst.

Bursts

Mar 18, 2025 to Mar 20, 2025: about 23 more stars than usual, peak 10 in one day, a spike that tapers off. Outside explanation: a jump in forks.
Mar 30, 2025 to Apr 14, 2025: about 755 more stars than usual, peak 153 in one day, a spike that tapers off. Outside explanation: a jump in forks.
Apr 28, 2025 to May 2, 2025: about 716 more stars than usual, peak 392 in one day, a spike that tapers off. Outside explanation: a Hacker News post, a jump in forks.
May 6, 2025 to May 8, 2025: about 665 more stars than usual, peak 378 in one day, a spike that tapers off. Outside explanation: a jump in forks.
May 22, 2025 to May 23, 2025: about 131 more stars than usual, peak 102 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Jul 6, 2025 to Jul 12, 2025: about 652 more stars than usual, peak 229 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Jul 19, 2025 to Jul 23, 2025: about 1k more stars than usual, peak 362 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Aug 4, 2025 to Aug 8, 2025: about 729 more stars than usual, peak 246 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Aug 19, 2025 to Sep 11, 2025: about 6.7k more stars than usual, peak 1.2k in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Nov 9, 2025 to Nov 15, 2025: about 486 more stars than usual, peak 156 in one day, a shape we can't classify. Outside explanation: a jump in forks, a jump in issues and pull requests.
Dec 11, 2025 to Jan 14, 2026: about 6.3k more stars than usual, peak 1.3k in one day, a shape we can't classify. Outside explanation: a Hacker News post, a jump in forks, a jump in issues and pull requests.
Jan 22, 2026 to Jan 25, 2026: about 302 more stars than usual, peak 157 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Feb 23, 2026 to Feb 27, 2026: about 183 more stars than usual, peak 107 in one day, a shape we can't classify. Outside explanation: a jump in forks, a jump in issues and pull requests.
Mar 31, 2026 to Apr 6, 2026: about 316 more stars than usual, peak 98 in one day, a shape we can't classify. Outside explanation: a jump in issues and pull requests.
May 1, 2026 to May 2, 2026: about 305 more stars than usual, peak 238 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Jul 10, 2026 to Jul 14, 2026: about 91 more stars than usual, peak 48 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.

2 stars GitHub has since removed (tracked since Oct 14, 2026).

Anyone can buy stars for any repo; bursts alone don't prove the owner did.

The star history looks organic.

Sources: How star history is analyzed

Risk

Complete

Flags

No risk flags.

License

Now: Apache-2.0 (OSI-approved)
A year ago: Apache-2.0 (OSI-approved)

Packages

No published packages found.

Sources: GitHub: simstudioai/sim

Badge

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Earlier verdicts

Oct 14, 2026: Caution
Oct 14, 2026: Caution

Computed 10 hours ago · method 2026.10.2