Security & Data Handling
Built for finance teams that take data security seriously. Here is exactly how your spreadsheet data flows through Arclen — and why nothing is stored.
How your data flows
From your Excel cells to AI processing and back — every step is encrypted, isolated, and ephemeral.
TLS 1.3
Encrypted
AI ProviderDPA — zero retention
Direct
ResultWritten to your cells
Your ExcelSelected cells only
TLS 1.3
Arclen APIEU servers (Frankfurt)
Encrypted
AI ProviderDPA — zero retention
Direct
ResultWritten to your cells
Zero data retention after processing
Data handling in detail
EU-hosted infrastructure
All data processing runs on EU servers (Frankfurt, eu-central-1). Your spreadsheet data never leaves the European Union.
Zero data retention
Raw cell data is held in memory only during processing and deleted immediately after. No files, no copies, no logs of your content.
Encrypted everywhere
TLS 1.3 in transit between Excel and our API. AES-256 encryption at rest for any metadata (account info, usage history).
Isolated processing
Each request runs in its own isolated context. No data crosses between users or between requests.
AI sub-processors
We maintain Data Processing Agreements with every AI provider. Your data is never used for model training.
Provider
Usage
DPA
Data retention
Training
Google Gemini
Usage: Primary model for bulk enrichment
DPA: Active
Retention: Zero — no storage after API response
Training: Opted out
Anthropic Claude
Usage: Alternative model option
DPA: Active
Retention: Zero — no storage after API response
Training: Opted out
OpenAI
Usage: Alternative model option
DPA: Active
Retention: Zero — no storage after API response
Training: Opted out
Excel add-in permissions
AlgoSheet follows the principle of least privilege. It only accesses what you explicitly provide.
✓
Read selected cells
Only the cells you explicitly include in your prompt are sent to our API
✓
Write to output cells
Results are written only to the column you designate
✕
Full workbook access
The add-in never reads your entire workbook or other sheets
✕
External network calls
The add-in only communicates with algosheet.arclen.app — no third-party scripts
✕
Local file system access
No access to files on your machine beyond the open workbook
Compliance
✓
GDPR Compliant
EU data privacy regulations. All processing in EU (Frankfurt). Data Processing Agreement available on request.
✓
CCPA Compliant
California Consumer Privacy Act. Users can request data export or deletion at any time from their dashboard.
Security FAQs
Need security documentation?
We can provide DPAs, security questionnaire responses, architecture documentation, and compliance certificates.
AI-powered Excel enrichment for M&A and finance teams