Nullify AI vs Seal Security (2026): Pricing, Features & Which to Choose

Who comes out ahead

Based only on the facts in our directory. The right pick still depends on the job you need done.

Lower starting price
Not comparable
Not comparable: Seal Security does not list a price
Free plan
Tie
Neither has one
Higher rating
Seal Security
4.0 against 4.1
Same job?
Yes
Both are Security & Compliance AI tools

Side by side

Compared on	Nullify AI	Seal Security
Our rating	4.0	4.1Better
Starts at	$67/mo	Not listed
Free plan	No	No
Category	Security & Compliance AI	Security & Compliance AI
Plans	From $67/mo	See pricing
Key features	Autonomous vulnerability detection, triage, and merge-ready autofix pull requests Direct GitHub and Slack integration for repository assessment Unlimited repositories and users on the Pro tier rather than seat-based limits Pull-request-level review built into existing developer workflows Enterprise tier with SSO and advanced integration support	Production-ready fixes for open source vulnerabilities Backported patches that avoid breaking version upgrades Human vetting of fixes before delivery Coverage across languages and package ecosystems Integration with existing application security scanners
Pros	Moves past detection-only scanning by opening autofix pull requests directly Unlimited repositories and users on Pro avoids per-seat cost creep as teams grow Backed by recognized security and deep-tech investors (Two Sigma Ventures, Root Ventures)	Backports avoid forcing breaking dependency upgrades Fixes are vetted rather than generated and shipped blind Works alongside scanners already in place
Cons	No free tier, so evaluating the product means committing to the $800/year Pro plan Autonomous autofix still needs review before merge on higher-risk codebases Founded in 2022, with a shorter track record than legacy AppSec vendors	Ecosystem coverage should be confirmed for less common languages Enterprise pricing with no self-serve path
Company	Nullify, founded 2022	Seal Security, founded 2022

Prices come from each vendor's pricing page, last checked 20260812. Check the vendor before you buy.

FAQ

Questions people ask

Is Nullify AI better than Seal Security?

In our reviews Nullify AI scores 4.0 and Seal Security scores 4.1. The better pick depends on the job. Nullify AI: Autonomous AI agent that finds, prioritizes, and fixes code vulnerabilities. Seal Security: Remediation agent that ships production-ready fixes for open source vulnerabilities.

Which is cheaper, Nullify AI or Seal Security?

Nullify AI: from $67/mo. Seal Security: see pricing.

Do Nullify AI and Seal Security have free plans?

Neither lists a free plan.

More comparisons

Nullify AI compared with

All Nullify AI alternatives

Seal Security compared with

All Seal Security alternatives