Mastra vs RelAI
Mastra vs RelAI, compared side by side on 22 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 RelAI on 51/100.
Where each one leads
Mastra
- our overall score: 77/100 against 51/100
- agent readiness: 58/100 against 41/100
- domain rating: 76/100 against 23/100
- headcount: 53 against 7
- headcount growth: +204.5% against -41.5%
- funding raised: $35.5M against $6.9M
- LinkedIn following: 6,591 against 1,271
RelAI
Leads on none of the measures we hold for both companies.
At a glance
| Measure | Mastra | RelAI |
|---|---|---|
| What it is | An open-source TypeScript/JavaScript framework for building AI agents, from the creators of Gatsby. | An open-source platform for building, simulating, evaluating, and optimizing reliable AI agents. |
| Category | Agentic AI, AI Agents, Developer Tools, Open Source | Agentic AI, AI Agent, Foundation Model, AI Tools |
| Sells toBusiness model | B2B | B2B |
| Offering | Platform | Platform |
| Founded | 2024 | 2023 |
| Headquarters | San Francisco, United States | San Francisco, United States |
| Status | Active | Active |
Size, funding and growth
| Measure | Mastra | RelAI |
|---|---|---|
| Employees | 53 | 7 |
| Headcount growthLast 12 months | +204.5% | -41.5% |
| Total funding | $35.5M | $6.9M |
| Latest round | Series A | Funding Round |
| LinkedIn followers | 6,591 | 1,271 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Mastra | RelAI |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 77/100 | 51/100 |
| Traction | 70/100 | 44/100 |
| Team | 90/100 | 30/100 |
| Community | 38/100 | Not published |
| Search visibility | 68/100 | 43/100 |
| Quality | 78/100 | 58/100 |
| Agent readinessHow well an AI agent can read and act on the site | D (58/100) | D (41/100) |
| Domain ratingLink authority, 0-100 | 76/100 | 23/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Mastra | RelAI |
|---|---|---|
| Hosting | Vercel | Not detected |
| CDN | Vercel | Cloudflare |
| Frameworks | Next.js, Tailwind CSS | Not detected |
| Open source | Yes, 15,100 GitHub stars | Yes |
| Self-hostable | Yes | Yes |
Product and pricing
| Measure | Mastra | RelAI |
|---|---|---|
| Key features | AI Agent Framework, Workflows, RAG, Evals, Memory & Tool Selection, Open Source & Modular | Not published |
What users say
| Measure | Mastra | RelAI |
|---|---|---|
| Community ratingVisitor votes on StartupHub | 5.0/5 from 2 votes | Not published |
Mastra vs RelAI: common questions
Which is better, Mastra or RelAI?
On our 0-100 score Mastra rates higher (77/100 against 51/100). 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 22 data points above: read the rows that match what you are buying for.
How do Mastra and RelAI compare on the numbers?
Mastra leads on our overall score (77/100 against 51/100), agent readiness (58/100 against 41/100), domain rating (76/100 against 23/100), headcount (53 against 7), headcount growth (+204.5% against -41.5%), funding raised ($35.5M against $6.9M), LinkedIn following (6,591 against 1,271).
Read the full Mastra review and pricing or the RelAI review and pricing. You can also browse other Mastra alternatives we track.