Available worldwide
What is Flask?
Flask is a Python-based web framework that emphasizes ease of use and quick setup while supporting complex applications. It provides built-in routing, template rendering, and session management, with extensibility through community-maintained extensions.
Flask pricing
We don't have Flask's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
What Flask does
The capabilities that matter for web frameworks, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Rendering model
- Server-side
- File-based routing
- ✗
- Language
- Python
- Server components
- -
- Streaming SSR
- ✓
- Built-in API / backend routes
- ✓
- First-class TypeScript
- ✗
- Fast refresh / HMR
- ✓
- Edge runtime support
- -
Platform & deployment
Independently observed- CLI
- Web
Security & compliance
Known vulnerabilities: 5 (1 in the last 12 months), max severity HIGH sourcea count reflects scale & disclosure, not quality
Flask alternatives
Other web frameworks we track, ranked by the same independent score.
The Vioscale score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Flask, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Dependent projects | 85 | 0.08 | 6.8 | ✓ |
| Capabilities | 58 | 0.08 | 4.8 | ✓ |
| Development activity | 39 | 0.12 | 4.6 | ✓ |
| Release cadence | 65 | 0.07 | 4.4 | ✓ |
| Security score | 71 | 0.05 | 3.8 | ✓ |
| Stars | 92 | 0.03 | 3.0 | ✓ |
| Integrations | 0 | 0.05 | 0.0 | - |
| Security posture | 0 | 0.09 | 0.0 | - |
| Package downloads | 0 | 0.17 | 0.0 | - |
| Developer Q&A activity | 0 | 0.08 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 16 | mediumsource · 2026-08-26 · 65% |
Adoption
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Language: Python · Rendering: ssr · Api routes: Yes · Hot reload: Yes · File routing: No · Streaming ssr: Yes | mediumsource · 2026-08-16 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | Python | highsource · 2026-08-26 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | BSD-3-Clause | highsource · 2026-08-26 · 95% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | PrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: … | highsource · 2026-08-16 · 75% |