Mastra vs Polars
Mastra vs Polars, compared side by side on 19 data points: what each one does, how big it is, what it has raised, the tech running each site, and what users report. We score both out of 100 on traction, team and visibility: Mastra is on 77/100 and Polars on 47/100.
Where each one leads
Mastra
- our overall score: 77/100 against 47/100
- agent readiness: 58/100 against 29/100
- headcount: 53 against 26
- funding raised: $35.5M against $21.0M
Polars
- LinkedIn following: 25,824 against 6,591
At a glance
| Measure | Mastra | Polars |
|---|---|---|
| What it is | An open-source TypeScript/JavaScript framework for building AI agents, from the creators of Gatsby. | An open-source, high-performance DataFrame library for Rust and Python, designed for efficient data manipulation and analysis. |
| Category | Agentic AI, AI Agents, Developer Tools, Open Source | Data Manipulation, Data Analysis, DataFrame Library, Open Source |
| Sells toBusiness model | B2B | B2B |
| Offering | Platform | Software |
| Founded | 2024 | Not published |
| Headquarters | San Francisco, United States | Not published |
| Status | Active | Active |
Size, funding and growth
| Measure | Mastra | Polars |
|---|---|---|
| Employees | 53 | 26 |
| Headcount growthLast 12 months | +204.5% | Not published |
| Total funding | $35.5M | $21.0M |
| Latest round | Series A | Series A |
| LinkedIn followers | 6,591 | 25,824 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Mastra | Polars |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 77/100 | 47/100 |
| Traction | 70/100 | 51/100 |
| Team | 90/100 | Not published |
| Community | 38/100 | Not published |
| Search visibility | 68/100 | 36/100 |
| Quality | 78/100 | 58/100 |
| Agent readinessHow well an AI agent can read and act on the site | D (58/100) | F (29/100) |
| Domain ratingLink authority, 0-100 | 76/100 | 74/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Mastra | Polars |
|---|---|---|
| Hosting | Vercel | Netlify |
| CDN | Vercel | Netlify |
| Frameworks | Next.js, Tailwind CSS | Not detected |
| Analytics | Not detected | Plausible |
| Open source | Yes, 15,100 GitHub stars | Yes |
| Self-hostable | Yes | Yes |
Product and pricing
| Measure | Mastra | Polars |
|---|---|---|
| Key features | AI Agent Framework, Workflows, RAG, Evals, Memory & Tool Selection, Open Source & Modular | Not published |
What users say
| Measure | Mastra | Polars |
|---|---|---|
| Community ratingVisitor votes on StartupHub | 5.0/5 from 2 votes | Not published |
| Reddit sentimentThreads we track | Not published | 1 positive, 1 negative across 6 threads |
“I'm still early on in my journey of learning python and one thing I'm seeing is that people don't really like pandas at all as its unintuitive as a library and I'm seeing a lot of praise for Polars. personally I also don't really like panda”r/learnpython
Mastra vs Polars: common questions
Which is better, Mastra or Polars?
On our 0-100 score Mastra rates higher (77/100 against 47/100). The score weights traction, team, visibility and profile completeness, so it reflects company strength rather than which product suits you. We compare the two on 19 data points above: read the rows that match what you are buying for.
How do Mastra and Polars compare on the numbers?
Mastra leads on our overall score (77/100 against 47/100), agent readiness (58/100 against 29/100), headcount (53 against 26), funding raised ($35.5M against $21.0M). Polars leads on LinkedIn following (25,824 against 6,591).
What do real users say about Mastra and Polars?
Polars: 1 positive and 1 negative mentions across 6 Reddit threads we track, mostly in r/learnpython.
Read the full Mastra review and pricing or the Polars review and pricing. You can also browse other Mastra alternatives we track.