StellarBase

Publisher Attestation: The information on this page is based on a self-assessment report provided by the app developer on the security, compliance, and data handling practices followed by this app. Microsoft makes no guarantees regarding the accuracy of the information.

Last updated by the developer on: October 22, 2026

General information

Information provided by to Microsoft:

Information Response
App name StellarBase
ID stellarbaseai.stellarbaseai
Company's website https://www.stellarbase.ai
App's Terms of Use https://www.stellarbase.ai/legal/terms-of-use
Core functionality of the app Stellarbase is an AI knowledge platform. Its SharePoint connector lets users sync selected SharePoint Online and OneDrive for Business files into a Stellarbase workspace, where they are indexed and made searchable and usable by AI assistants, agents and workflows. Users can browse sites and drives, choose folders to sync, and delete synced files.
Company headquarter location Czechia
App info page https://www.stellarbase.ai
What is the hosting environment or service model used to run your app? Iaas_Hybrid_Onprem
Which hosting cloud providers does the app use? Zoner Cloud, ScaleWay
Is AI functionality part of the app's features or workflows? Yes
Online Service interfaces Microsoft Entra ID (OAuth 2.0 / OIDC), Microsoft Graph REST API v1.0

Questions

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How the app handles data

This information has been provided by about how this app collects and stores organizational data and the control that your organization will have over the data the app collects.

Information Response
Does the app or underlying infrastructure process any data relating to a Microsoft customer or their device? Yes
What data is processed by your app? SharePoint/OneDrive contents and metadata
Does the app support TLS 1.2 or higher? Yes
Does the app or underlying infrastructure store any Microsoft customer data? Yes
What data is stored in your databases? Microsoft account email and tenant ID; encrypted (AES-256-GCM) OAuth refresh token; granted scopes; file/folder metadata and delta-sync tokens; derived content from synced files: Markdown/text/JSON conversions, extracted images, chunks, embeddings, summaries, document profiles; AI traces with retrieved chunks; database backups (30 days). Original file bytes are fetched live from Graph, not stored.
If underlying infastructure processes or stores Microsoft customer data, where is this data geographically stored? France, Netherlands (the)
Do you have an established data rentention and disposal process? No
How long is data retained after account termination? More than 90days
Do you have an established data access management process? Yes
Do you transfer customer data or customer content to third parties or sub-processors? Yes
Do you have data sharing agreements in place with any third party service you share Microsoft customer data with? No

Questions

Questions or updates to any of the information you see here? Contact us!

This information has been provided by StellarBase about the security practices this app employs.

Information Response
Do you perform annual penetration testing on the app? No
Does the app have a documented disaster recovery plan, including a backup and restore strategy? Yes
Does your environment use traditional anti-malware protection or application controls? ApplicationControls
Do you have an established process for indentifying and risk ranking security vulnerabilities? Yes
Do you have a policy that governs your service level agreement (SLA) for applying patches? Yes
Do you carry out patch management activities according to your patching policy SLAs? Yes
Does your enviroment have any unsupported operating systems or software? Yes
Do you conduct quarterly vulnerability scanning on your app and the infastructure that supports it? No
Do you have a firewall installed on your external network boundary? Yes
Do you have an established change management process used to review and approve change requests before they are deployed to production? Yes
Is an additional person reviewing and approving all code change requests submitted to production by the original developer? Yes
Do secure coding practices take into account common vulnerability classes such as OWASP Top 10? Yes
Multifactor Authentication (MFA) enabled for: CodeRepositories
Do you have an established process for provisioning, modification, and deletion of employee accounts? Yes
Do you have Intrusion Detection and Prevention (IDPS) software deployed at the perimeter of the network boundary supporting your app? No
Do you have event logging set up on all system components supporting your app? No
When a security event is detected are alerts automatically sent to an employee for triage? Yes
Do you have a formal information security risk management process established? Yes
Do you have a formal security incident response process documented and established? Yes
Do you report app or service data breaches to supervisory authorities and individuals affected by the breach within 72 hours of detection? Yes

Questions

Questions or updates to any of the information you see here? Contact us!

This information has been provided by regarding the compliance standards their app requires and the certifications they have achieved.

Information Response
Does the app comply with the Health Insurance Portability and Accounting Act (HIPAA)? No
Does the app comply with Health Information Trust Alliance, Common Security Framework (HITRUST CSF)? No
Has the organization achieved a Service Organization Controls (SOC 1) Certification? No
Has the organization achieved a Service Organization Controls (SOC 2) Certification? Yes
Which SOC 2 certification did you achieve? type2
Most recent SOC2 certification date 2026-07-03
Has the organization achieved a Service Organization Controls (SOC 3) Certification? No
Do you carry out annual PCI DSS assessments against the app and its supporting environment? No
Is the app International Organization for Standardization (ISO 27001) certified? Yes
Does the app comply with International Organization for Standardization (ISO 27018)? Yes
Does the app comply with International Organization for Standardization (ISO 27017)? Yes
Does the app comply with International Organization for Standardization (ISO 27002)? No
Is the app Federal Risk and Authorization Management Program (FedRAMP) compliant? No
Does the app comply with Family Educational Rights and Privacy Act (FERPA)? No
Does the app comply with Children's Online Privacy Protection Act (COPPA)? Yes
Does the app comply with Sarbanes-Oxley Act (SOX)? No
Does the app comply with NIST 800-171? No
Has the app been Cloud Security Alliance (CSA Star) certified? No

Questions

Questions or updates to any of the information you see here? Contact us!

This information has been provided by about the privacy posture of their app.

Information Response
Do you have GDPR or other privacy or data protection requirements or obligations (such as CCPA)? Yes
Does the app have an external-facing privacy notice that describes how it collects, uses, shares, and stores customer data? Yes
Privacy Policy URL https://www.stellarbase.ai/legal/privacy-policy
Does the app perform automated decision making, including profiling that could have a legal effect or similar impact? No
Does the app process customer data for a secondary purpose not described in the privacy notice (i.e. marketing, analytics)? No
Do you process special categories of sensitive data (i.e. racial or ethnic origin, political opinion, religious or philosophical beliefs, genetic or biometric data, health data) or categories of data subject to breach notification laws? No
Does the app collect or process data from minors (i.e., individuals under the age of 16)? No
Does the app have capabilities to delete an individual's personal data upon request? Yes
Does the app have capabilities to restrict or limit the processing of an individual's personal data upon request? Yes
Does the app provide individuals the ability to correct or update their personal data? Yes
Are regular data security and privacy reviews performed (for example, Data Protection Impact Assessments or privacy risk assessments) to identify risks related to the processing of personal data for the app? Yes

Questions

Questions or updates to any of the information you see here? Contact us!

Information Response
Does your application integrate with Microsoft identity platform (Microsoft Entra ID) for single-sign on, API access, etc.? Yes
Have you reviewed and complied with all applicable best practices outlined in the Microsoft identity platform integration checklist? No
Does your app use the latest version of MSAL (Microsoft Authentication Library) or Microsoft Identity Web for authentication? N/A
Does your app support Conditional Access policies? Yes
List the types of policies supported Policies are evaluated by Entra ID at interactive sign-in: MFA, sign-in/user risk, sign-in frequency, named locations and device compliance. Background sync refreshes tokens server-side from our cluster, so location/device policies that block that refresh revoke the connection until the user re-authenticates. Claims challenges and CAE are not handled.
Does your app support Continuous Access Evaluation (CAE) No
Does your app store any credentials in code? No
Apps and add-ins for Microsoft 365 might use additional Microsoft APIs outside of Microsoft Graph. Does your app or add-in use additional Microsoft APIs? No

Data access using Microsoft Graph

Graph Permission Permission Type Justification Microsoft Entra App ID
Files.ReadWrite.All delegated Files.ReadWrite.All covers the work with files. For reading, we list the contents of the selected folders, track changes through delta sync, and download file contents so we can index them and make them available to search and AI. For writing, when a user deletes a synced file in Stellarbase, it is deleted in SharePoint as well. The backend can also upload files and create folders in the connected libraries, although the user interface does not offer uploading to SharePoint yet. 46a9ce96-cbbe-427c-ad45-b65058487585
Sites.ReadWrite.All delegated Sites.ReadWrite.All lets us list the SharePoint sites and document libraries the user can access (site search, followed sites, the libraries of each site). The user then picks the folders to sync from them. We only ever read sites. 46a9ce96-cbbe-427c-ad45-b65058487585
User.Read delegated User.Read is the standard sign-in permission. The user signs in with their Microsoft work or school account, and we take their email and tenant ID from the ID token to bind the connection to the right tenant. We make no direct Graph call for this. 46a9ce96-cbbe-427c-ad45-b65058487585
offline_access delegated offline_access gives us a refresh token. It lets the background sync of the selected folders keep running without the user having to sign in again. 46a9ce96-cbbe-427c-ad45-b65058487585

This application does not have Additional APIs.

Questions

Questions or updates to any of the information you see here? Contact us!

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