Fume vs Lumen

Comprehensive side-by-side comparison — features, pricing, performance, and more.

Updated October 2026

Fume

Fume Technologies, Inc.

Get an extensive Playwright test suite overnight — autonomous AI QA

Paid

72% verification coverage

Lumen

Buildt AI Limited

The coding model that actually gets it — specialist coding AI (Cosine)

Freemium

73% verification coverage

Trust & Reliability

Fume

SOC 2

Lumen

Trust data not available yet

Overall Winner: Lumen

6.1/10 vs Fume at 4.3/10

Leads in:

Customization

Integration

Performance

Scores are AI-estimated from publicly available data — not an independent test or a verified user rating. How we rank →

AI Comparison Summary

Fume

4.3

avg score

Lumen

6.1

avg score

Lumen leads overall — particularly in Customization and Integration and 2 more.

Based on 7 dimensions

Scores are AI-estimated from publicly available data — not an independent test or a verified user rating. How we rank →

Overall Winner

Lumen

6.1 / 10

Fume

Best For

Growing engineering teams automating browser testing without dedicated QA engineers

Software development teams needing resilient end-to-end tests that self-heal

Organizations migrating existing Playwright, Selenium, or Cypress tests to an AI-powered system

Companies seeking full code ownership and local execution of AI-generated tests

Lumen

Best For

Engineering teams in highly regulated industries needing secure, air-gapped AI coding capabilities

Organizations working with legacy systems and niche programming languages like COBOL or Fortran

Enterprise development teams requiring production-quality code generation and complex architecture reasoning

Software development teams seeking to improve code quality and accelerate development cycles in secure environments

* Verdict is based on our algorithmic scoring of publicly available data. Learn about our methodology

Fume is best for

🤖Automation & Agents6.2✍️Writing & Content6.0💬Chat & Conversation6.0

Lumen is best for

✍️Writing & Content8.0💬Chat & Conversation8.0🔍Research8.0

Filter by your use case:

Limitations

Fume

Cons

No cons listed yet.

Lumen

Cons

No cons listed yet.

Weighted Score — Adjust What Matters to You

Pick a profile or drag sliders — scores and radar update instantly on the right.

Quick profiles:

Ease of Use5

Customization5

Support5

Integration5

Compliance & Data Protection5

Performance5

Planning Quality5

Dimension Comparison

Fume

4.3

/ 10

Lumen

6.1

/ 10

Clear winner

Dimension Breakdown

Ease of Use

How intuitive is onboarding, UI navigation, and day-to-day usage for the target audience?

Fume

5.0

Lumen

5.0

Customization

Calculated

How much can users tailor workflows, settings, prompts, or outputs to their needs?

Fume

5.0

Lumen

8.0▲ +3.0

Support

How strong is the documentation, customer support, community, and learning resources?

Fume

4.0

Lumen

5.0▲ +1.0

Integration

Calculated

How well does it connect with other tools, APIs, and workflows?

Fume

4.0

Lumen

6.0▲ +2.0

Compliance & Data Protection

Calculated

Compliance certifications and data-protection posture, counted from ten verified signals: SOC 2 Type II, GDPR compliance, HIPAA, WCAG AA/AAA, PII redaction, licensed-only training, a published sub-processor list, a downloadable DPA, not training on user data, and a documented deletion path

Fume

2.0

Lumen

5.0▲ +3.0

Performance

Calculated

Latency + throughput speed

Fume

2.0

Lumen

6.0▲ +4.0

Planning Quality

Calculated

Multi-step planning depth + replanning capability

Fume

8.0

Lumen

8.0

Calculated = derived from structured signals (integration count, API/open-source config, compliance certs, response-time). AI = LLM-assessed from public website content. Methodology

Task Performance

Fume

Task

Lumen

1.0

Code Completion

6.0

Bug Detection

6.0

2.0

Code Explanation

6.0

5.0

Refactoring

8.0

10.0

Test Generation

5.0

2.0

Multi Language Support

9.0

6.0

Context Understanding

8.0

1.0

Documentation Generation

5.0

2.0

Performance Optimization

5.0

1.0

Security Scanning

6.0

3.0

Api Management

3.0

9.0

Ci Cd Integration

5.0

* Task scores (1–10) are algorithmically generated from publicly available data.

Data is sourced from public information and vendor websites. It may not always be up-to-date — verify pricing and features directly with the vendor before purchasing.Report inaccuracy

Frequently Asked Questions

Which is better, Fume or Lumen?

Both are strong options. Fume is a strong choice, while Lumen is a strong choice. The best choice depends on your specific use case, budget, and workflow requirements.

Is Fume cheaper than Lumen?

Fume starts at free (paid model) with a free trial. Lumen starts at free (freemium model). Use the Cost Calculator above for a detailed estimate.

What are the main differences between Fume and Lumen?

Fume — "Get an extensive Playwright test suite overnight — autonomous AI QA". Lumen — "The coding model that actually gets it — specialist coding AI (Cosine)". Key differences include their pricing models, platform support, integrations, and technical capabilities. See the Feature Comparison table above for a complete side-by-side breakdown.

Can I use Fume and Lumen together?

Yes, many teams use both tools together for different purposes. Use the Stack Builder section above to combine Fume and Lumen with other tools and save your AI toolkit.

Does Fume or Lumen have a free plan?

Fume is a paid tool with a free trial. Lumen is available for free. Always verify current pricing directly with the vendor.

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