How Arrow is used
Arrow is a dependency in 4 of the 6,208 public GitHub projects set up for AI coding agents that we scanned, too few to describe it from them alone. Our scan also samples projects by dependency (Solana 2,661, Ethereum and EVM 1,496, 3D and games 2,818, agent frameworks and SDKs 10,983); counting those, it appears in 144 projects, and what it is used with below comes from all of them. The most used alternative in our scan is python-dateutil (102 projects). Projects that use it most often also use Jinja2 (98.6%), MarkupSafe (97.9%), attrs (96.5%).
Arrow popularity over time
Gid Score 66: downloads 89, use in agent projects 56, GitHub stars 48, downloads trend 55 (each 0-100). How it is calculated.
Often used with Arrow
| Jinja2 | 98.6% of Arrow projects · 45.3× more than average |
|---|---|
| MarkupSafe | 97.9% of Arrow projects · 132.1× more than average |
| attrs | 96.5% of Arrow projects · 139.4× more than average |
| packaging | 96.5% of Arrow projects · 65.9× more than average |
| jsonschema | 95.8% of Arrow projects · 58.9× more than average |
| AnyIO | 95.1% of Arrow projects · 64.2× more than average |
| NumPy | 95.1% of Arrow projects · 16.3× more than average |
| charset-normalizer | 94.4% of Arrow projects · 87.5× more than average |
From all 144 projects in our scan that use Arrow, including the dependency samples.
How Arrow is funded
Open Collective: Arrow
| Received, last 12 months | $24 Oct 2025 – Sep 2026 |
|---|---|
| Estimated annual budget | $25 Open Collective's estimate |
| Balance | $256 |
| Raised since the start | $256 |
| Typical month median, last 12 months | $2 · $4 over 24 months |
| Last 12 months vs the 12 before | -50% |
| Contributors, last 12 months | 1 |
Top company backers all time
| Batch | $305 since Jan 2021 |
|---|
Oct 2021Sep 2026
Money by month, last five years. First money received in Dec 2020. The typical month is the median: one big one-off donation does not move it.
USD after payment processor fees, as Open Collective reports it; fiscal host Open Source Collective. Source
Ways to fund Arrow
Open Collective
As the maintainers list them in FUNDING.yml on GitHub. Checked Oct 20, 2026.
Install
| Package | pip install arrow |
|---|---|
| Main stacks | Python (143), Next.js (1) |
| Example projects | Paper2Poster/Paper2Poster, BlackArbsCEO/Adv_Fin_ML_Exercises, YuhangChen1/Paper2All, Luffy03/Large-Scale-Medical, aihes/LangChain-Tutorials-and-Examples |
Alternatives to Arrow
Tools that do the same job, so a project picks one or the other. Add-ons and libraries used alongside Arrow are not listed here; they are in "Often used with".
| Tool | Gid Score | Used in agent projects | Downloads / wk | GitHub stars | License |
|---|---|---|---|---|---|
| python-dateutil pypi Extensions to Python's datetime module for advanced date and time manipulation. |
72 | 102 (6.3%) | 244M | 2,639 | Apache-2.0 / BSD |
| pytz pypi Python timezone library with historical and modern timezone definitions. |
65 | 58 (3.6%) | 108M | 396 | MIT |
More in Utilities: clsx date-fns PyYAML uuid yaml js-yaml glob Lodash