Thumbor
On-demand image transformation and optimization with AI-powered smart cropping
- Also known as
- thumbor
What is Thumbor?
An HTTP server that processes images on-the-fly, enabling cropping, resizing, filtering, and optimization with AI-powered intelligent detection to automatically focus on relevant content like faces and features.
Thumbor pricing
We don't have Thumbor'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 Thumbor does
The capabilities that matter for image optimization, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Architecture model
- -
- On the fly URL parameter resizing and cropping
- ✓
- Auto webp avif format negotiation via browser headers
- -
- AI smart crop face detection centering
- ✓
- Lossless and perceptual lossy compression algorithms
- ✓
- Global CDN edge delivery network included
- -
- Watermarking and text overlay via URL API
- -
- Video transcoding and gif to mp4 conversion
- -
- Svg sanitization and optimization
- -
- Dashboard analytics for bandwidth cache hit ratio
- -
- SOC2 type ii
- -
- ISO 27001
- -
- Pricing model
- -
Platform & deployment
Independently observed- CLI
- Linux
- On-premise
- Self-hosted
Security & compliance
Known vulnerabilities: 6 (6 in the last 12 months), max severity HIGH sourcea count reflects scale & disclosure, not quality
Thumbor FAQ
Common questions about Thumbor, answered from independent, dated evidence.
What is Thumbor?
Thumbor is an open-source image processing service that automatically optimizes images on-demand using smart face detection. It supports dynamic cropping, resizing, format conversion (including WebP), and image filters to improve website performance and reduce file sizes. It is indexed under Image Optimization.
Source: https://www.thumbor.org
Is Thumbor free to use?
Thumbor is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. Pricing changes often, so verify at source before relying on it.
Source: https://www.thumbor.org
Is Thumbor open source?
Yes. Thumbor is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.
Thumbor alternatives
Other image optimization we track, ranked by the same independent score.
- ImageKitComplete visual media platform combining image and video optimization, asset management, and creative automationhigh · 76%
- GumletCloud platform for video hosting, streaming, and adaptive delivery with live streaming capabilitiesmedium · 74%
- UploadcareA file management platform for uploading, storing, processing, and delivering user-generated content at scalemedium · 73%
- Kraken.ioCloud image compression service to reduce file sizes and improve website performancemedium · 55%
- Bunny OptimizerImage resizing and optimization service integrated with CDN infrastructurelow · 38%
- Cloudflare ImagesCloud-based image storage and optimization service that automatically converts and delivers images in the optimal format for each user's device and browsermedium · 51%
Compare Thumbor
Side by side against other image optimization, attribute by attribute, with a source on every value.
The vioscaleAI 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 Thumbor, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Development activity | 57 | 0.09 | 5.4 | ✓ |
| Release cadence | 88 | 0.05 | 4.6 | ✓ |
| Capabilities | 58 | 0.07 | 4.1 | ✓ |
| Security score | 64 | 0.04 | 2.7 | ✓ |
| Dependent projects | 34 | 0.06 | 2.1 | ✓ |
| Stars | 76 | 0.03 | 2.0 | ✓ |
| Integrations | 0 | 0.08 | 0.0 | - |
| Security posture | 0 | 0.06 | 0.0 | - |
| Package downloads | 0 | 0.14 | 0.0 | - |
| Developer Q&A activity | 0 | 0.06 | 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 | 65 | mediumsource · 2026-10-07 · 65% |
Adoption
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 3 items | mediumsource · 2026-09-10 · 72% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Ai smart crop face detection centering, On the fly url parameter resizing and cropping, Lossless and perceptual lossy compression algorithms | mediumsource · 2026-10-07 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | Python | highsource · 2026-10-07 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | MIT | highsource · 2026-10-07 · 95% |
Pricing
Release
Security
Is Thumbor the right choice for you?
Tell us the job, the constraints and what you weigh most, and we will rank Thumbor against the rest of the image optimization we index, using the same dated evidence weighted your way.
Free to run, no account needed to start. How the evaluation works
Is this your product?
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