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Now in closed testing

The trust layer between
automation and your data

AI automates your spreadsheet, hard rules verify the output, and you see every change before it reaches your data.

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CellDelta badge Why CellDelta

Spreadsheets drive trillions in decisions every year. AI can now process them in seconds — but teams either don't trust it enough to use it, or spend just as long checking every result. We built CellDelta to close that gap.

Read our full compliance approach

Everything between the prompt
and your spreadsheet

  • Protection
  • Visibility
  • Accountability
Get Access
Protection

Self-learning data protection

Every file you process helps CellGuard build safety rules unique to your operations — catching errors before they reach your spreadsheet. No configuration needed.

Prefer to start without pattern learning? CellGuard's structural checks work instantly on every file with no session tracking.

One score. Full clarity.

Every AI-generated plan gets a Trust Score that tells you exactly how much you can trust the result — so you verify in seconds, not hours. Built from AI confidence, validations, and complexity, with weights you can fine-tune.

Visibility

Your spreadsheet, with every change marked

See exactly what AI wants to modify — in context, in your actual file. Nothing executes until you approve.

Structured breakdown of every modification

Added, modified, deleted — each change categorized with before and after values. Filter, review, export.

Accountability

Complete audit trail, always

Every action cryptographically logged with a SHA-256 hash chain. Tamper-proof, export-ready, and GDPR-aware from the first click.

Architecture aligned with global AI regulation

What gives your team full control is exactly what regulators now require.

Speak with our specialists

The window to prepare is closing

AI regulation worldwide is shifting from guidelines to enforcement — and the nearest deadlines are months away.

Active since 2018
GDPR
General Data Protection Regulation
EU + Extraterritorial · All sectors · Penalties: €20M / 4%
The foundation of EU data protection. Requires lawful basis for processing, explicit consent, right to erasure, data portability, and breach notification. Applies to any company processing EU residents' data.
Built in: Consent gate, right to erasure, data processing transparency, audit-logged consent events
Jan 2025
DORA
Digital Operational Resilience Act
EU · Financial sector
Mandatory ICT risk management, incident reporting, and operational resilience testing for banks, insurers, and investment firms.
Built in: Tamper-proof logging for AI operations in financial workflows
Feb 2025
EU AI ActProhibited
EU AI Act — Prohibited Practices
EU · All sectors · Penalties: €35M / 7%
Ban on social scoring, manipulative AI, untargeted biometric scraping. AI literacy obligations for all providers and deployers.
Built in: Full AI transparency — model labeled, every action visible and logged
Aug 2025
EU AI ActGPAI models
EU AI Act — General-Purpose AI
EU · GPAI providers and deployers · Penalties: €15M / 3%
Obligations for general-purpose AI models: technical documentation, transparency, copyright compliance. Deployers must document which models they use and how outputs are validated.
Built in: Model identified per operation, usage documented in tamper-proof audit trail
Jan 2026
US State LawsTX · CA
Texas TRAIGA & California AI Transparency Act
US · All AI deployers in TX/CA
Texas: AI governance for consequential decisions, safe harbor for NIST/ISO frameworks. California: mandatory disclosure of AI-generated content, training data transparency.
Built in: Model identification, Trust Score transparency, full audit trail
Jan 2026
South KoreaAI Act
South Korea AI Basic Act
South Korea · Extraterritorial · High-impact AI
World's second comprehensive AI law. Transparency, risk assessment, human oversight, and documentation for high-impact AI systems. Applies to foreign companies serving Korean users.
Built in: Risk assessment via Trust Score, human oversight, full documentation
Jun 2026
ColoradoAI Act
Colorado AI Act
US · First comprehensive state AI law
Risk management, algorithmic discrimination prevention, impact assessments, consumer disclosures, and transparency requirements for high-risk AI systems.
Built in: Human-in-the-loop, risk documentation, consumer transparency
2 Aug 2026
EU AI ActFull enforcement
EU AI Act — High-Risk & Transparency
EU + Extraterritorial · All sectors · Penalties: up to €15M / 3%
Full enforcement of high-risk AI obligations: risk management, human oversight, record-keeping, transparency (Art. 50), conformity assessments, post-market monitoring. Applies to any company serving EU customers.
Built in: Human oversight, audit trail, transparency, risk scoring, export-ready evidence
Aug 2027
EU AI ActProducts
EU AI Act — Embedded Products
EU · AI in regulated products
High-risk AI systems embedded in regulated products (medical devices, machinery, vehicles) must comply. Backstop deadline regardless of standards availability.
Built in: Architecture designed for evolving compliance requirements
Swipe to explore timeline
Read our full compliance approach
Our Vision

AI should earn your trust, not demand it

Today, teams either avoid AI in critical workflows because the risk feels too high — or they use it and spend just as long manually checking every result. Add growing regulatory pressure, and the promise of automation stays out of reach.

We're building toward a future where that changes — where every AI-generated change is verified before it touches your data, every decision is documented and audit-ready, and built to fit the way your industry actually works. Not to replace human judgment, but so teams can finally trust automation enough to actually use it.

Krzysztof Dalewski — Co-Founder and CTO of CellDelta
Krzysztof Dalewski
CEO, Technical Founder
LinkedIn
Hubert Rogala — Co-Founder and CEO of CellDelta
Hubert Zieliński
CBO, Co-Founder
LinkedIn

Pricing that scales with your team

Start free. Upgrade when you're ready.

Free
Starter

Try it with your own data.

Free
no credit card required
 
  • Limited operations
  • Change preview & diff
  • Structural validation
  • Trust Score
  • Standard AI — Claude Sonnet 4.6
Get started free
Recommended
Professional

Everything you need to trust AI with your most important data.

$79
per user / month
 
  • Higher usage limits
  • CellGuard protection
  • Version history & rollback
  • Full audit trail export
  • Priority support
  • Advanced AI — Claude Opus 4.7
Enterprise
Custom Plan

Dedicated infrastructure, custom rules, hands-on support.

Let's talk
tailored to your organization
 
  • Everything in Professional
  • SSO & role-based access
  • Dedicated data environment
  • Custom validation rules
  • Direct founder support
  • Custom onboarding & integration

Automation you can finally trust

Try it free with your own data.

Data protection that gets smarter the more you use it

CellGuard builds a safety layer unique to how your team works. Not generic rules — patterns learned from your actual operations.

How it works
From first upload to full protection, automatically
CellGuard builds your safety net automatically. Here's what happens from the moment you upload a file:
1
Instant structural scan

CellGuard reads your file's structure — headers, data types, formulas, merged cells. It immediately flags broken sums, balance sheet mismatches, and impossible percentages.

2
Session recording

Every column's characteristics are quietly recorded — which values are always positive, which fields are never empty, what data types appear where. This happens in the background, transparently.

3
Pattern recognition

After enough sessions, CellGuard starts recognizing patterns unique to your company. It proposes guards you can accept or dismiss — no rule-writing, just one click.

4
Active protection

Accepted guards run automatically on every AI-generated change. If something violates a learned pattern — you'll know before it touches your data.

Steps 2–4 are optional. You can use CellGuard with structural checks only, without any pattern learning or session history. Full protection comes when you're ready.
Live example
See CellGuard catch anomalies in real time
This is what happens when AI modifies your spreadsheet and CellGuard is watching:
Quarterly_Report.xlsx
Client
Revenue
Margin
Status
Acme Ltd
€124,500
34%
Active
Bolt Inc
€89,200
28%
Active
ClearCo
€203,000
-5%
DriftHQ
€67,800
22%
Active
Waiting for AI changes…
Protection compounds
The longer you use CellDelta, the stronger it gets
Unlike generic rules, CellGuard builds knowledge that's deeply specific to your operations. Here's real growth from a pilot client:
Structural guards Learned patterns Anomalies caught
0
Day 1
0
Day 3
0
Week 1
0
Week 2
0
Week 3
0
Month 1
Protection that can't be replicated — it's built from your work, not a template.
Zero setup needed
CellGuard activates on your first upload

No rules to write. No templates to configure. Just upload your file and CellGuard starts protecting immediately.

Closed Testing

CellDelta is currently in closed testing

We're working with select enterprise teams to refine the platform before public launch. Book a demo to see CellDelta in action and join the waitlist for early access.

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Your real spreadsheets
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