kitio.aiTessl vs Adversa AI
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Tessl starts at $100/mo and Adversa AI starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Skills and plugin registry
- Skill activation analytics
- Before-and-after evals
- Tessl agent
- Spending limits
- Self-hosted option
- Coding agent monitoring
- AI detection and response
- LLM and agent red teaming
- MCP security testing
- EU AI Act assessments
| Feature | Tessl | Adversa AI |
|---|---|---|
| Best for | Registry and evals for the skills and context coding agents use | Security monitoring and red teaming for AI coding agents and LLMs |
| Category | Coding | Coding |
| Pricing model | Freemium | Paid |
| Starting price | $100/mo | See pricing page |
| Free plan | Yes | No |
| Made by | Tessl | Adversa AI |
| Based in | United Kingdom | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Tessl starts at $100/mo and Adversa AI starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- 1,000 credits per month
- Tessl agent
- Unlimited skills and plugins
- Single workspace
Team
$100/mo
- 5,000 credits per month
- Role management
- Pay-as-you-go beyond credits
Enterprise
Custom
- Bring your own LLM
- Self-hosted deployment
- SLAs and priority support
Prices in USD, checked Oct 29, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Tessl
- Free plan with 1,000 credits a month
- Evals catch skill regressions
- One registry across the org
- Team plan starts at $100 a month
- Frontier models burn credits faster
- Useful mainly for teams already using agents
Adversa AI
- Focused on AI-specific attack surfaces
- Covers coding agents and MCP
- Publishes open rating methodology
- No public pricing
- Demo required to start
- Aimed at enterprise security teams
Which one should you choose?
Choose Tessl if you want:
- Free plan with 1,000 credits a month
- Evals catch skill regressions
- One registry across the org
Watch out: team plan starts at $100 a month.
Choose Adversa AI if you want:
- Focused on AI-specific attack surfaces
- Covers coding agents and MCP
- Publishes open rating methodology
Watch out: no public pricing.
Tessl vs Adversa AI FAQ
What is the difference between Tessl and Adversa AI?
Tessl: Registry and evals for the skills and context coding agents use. Adversa AI: Security monitoring and red teaming for AI coding agents and LLMs. Both are coding tools.
Is Tessl or Adversa AI cheaper?
Tessl starts at $100/mo and Adversa AI starts at See pricing page. Check both pricing pages for current plans.
Do Tessl and Adversa AI have free plans?
Tessl: Yes. Adversa AI: No.
Who makes Tessl?
Tessl is made by Tessl, based in United Kingdom.
Who makes Adversa AI?
Adversa AI is made by Adversa AI.
Which should I choose, Tessl or Adversa AI?
Choose Tessl if you value free plan with 1,000 credits a month and evals catch skill regressions. Choose Adversa AI if you value focused on ai-specific attack surfaces and covers coding agents and mcp.