APIFae vs Harness
APIFae vs Harness, compared side by side on 11 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: APIFae is on 1/100 and Harness on 67/100.
Where each one leads
APIFae
Leads on none of the measures we hold for both companies.
Harness
- our overall score: 67/100 against 1/100
- agent readiness: 50/100 against 24/100
At a glance
| Measure | APIFae | Harness |
|---|---|---|
| What it is | A single-binary API mock server that records real traffic, then tells you when your mocks drift from the live API. No JVM, no runtime to install. Rust CLI available now; cloud in development. | The Modern Software Delivery Platform. |
| Category | API Platform, Developer Tools, Mock Server, API Testing | DevOps, Software Delivery, Cloud Native, Application Security |
| Sells toBusiness model | B2B | B2B |
| Offering | Software | Software |
| Founded | 2026 | 2017 |
| Headquarters | Not published | San Francisco, USA |
| Status | Active | Active |
Size, funding and growth
| Measure | APIFae | Harness |
|---|---|---|
| Employees | Not published | 1,625 |
| Total funding | Not published | $815M |
| Latest round | Not published | Series E |
| Valuation | Not published | $5.5B |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | APIFae | Harness |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 1/100 | 67/100 |
| Traction | Not published | 60/100 |
| Team | Not published | 60/100 |
| Community | Not published | 8/100 |
| Search visibility | Not published | 31/100 |
| Quality | Not published | 78/100 |
| Agent readinessHow well an AI agent can read and act on the site | F (24/100) | D (50/100) |
| Domain ratingLink authority, 0-100 | Not published | 78/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | APIFae | Harness |
|---|---|---|
| Hosting | Vercel | AWS |
| CDN | Vercel | Cloudflare |
| CMS | Not detected | Webflow |
| Analytics | Not detected | Google Tag Manager |
| Open source | No | Yes |
APIFae vs Harness: common questions
Which is better, APIFae or Harness?
On our 0-100 score Harness rates higher (67/100 against 1/100). 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 11 data points above: read the rows that match what you are buying for.
How do APIFae and Harness compare on the numbers?
Harness leads on our overall score (67/100 against 1/100), agent readiness (50/100 against 24/100).
Read the full APIFae review and pricing or the Harness review and pricing. You can also browse other APIFae alternatives we track.