Sentinel
Sentinel watches your websites so your clients don't have to tell you they're down. Connect the app and alerts land in the Slack channels your team already has open: the monitor name, what failed, and the region that saw it.What gets posted- Downtime and recovery, with the failure reason
- SSL certificates expiring, invalid, or expired
- DNS changes, keyword and JSON content failures, missed heartbeats and cron jobs
- Slow response warnings and domain expiration noticesBuilt to stay readable- Connect as many channels as you like, one install each
- Each channel picks what it hears about: outages, warnings, recoveries
- Per-monitor routing keeps staging noise away from the channel that pages people
- Quiet hours suppress non-critical alerts overnight while outages still get through
- Send a test message any time, so the wiring is proven before an outage tests itMinimal by designThe app asks for a single permission: posting messages to the channels you explicitly pick. It can't read your messages, browse your workspace, or see anything else.Slack notifications are included on Sentinel's Starter plan and above. Setup takes about a minute: click Add to Slack, pick a channel on Slack's own consent screen, and you're done.
- SSL certificates expiring, invalid, or expired
- DNS changes, keyword and JSON content failures, missed heartbeats and cron jobs
- Slow response warnings and domain expiration noticesBuilt to stay readable- Connect as many channels as you like, one install each
- Each channel picks what it hears about: outages, warnings, recoveries
- Per-monitor routing keeps staging noise away from the channel that pages people
- Quiet hours suppress non-critical alerts overnight while outages still get through
- Send a test message any time, so the wiring is proven before an outage tests itMinimal by designThe app asks for a single permission: posting messages to the channels you explicitly pick. It can't read your messages, browse your workspace, or see anything else.Slack notifications are included on Sentinel's Starter plan and above. Setup takes about a minute: click Add to Slack, pick a channel on Slack's own consent screen, and you're done.
Sentinel will be able to do:
Review the details to better understand this app’s security practices. To learn more about assessing apps for your workspace visit our Help Center.
General
Developer
Rootstuff
Company headquarters location
United States
Terms of service
Privacy & data governance
Data retention policy
Rootstuff retains customer account data (monitors, check results, incident history) for as long as the account is active. Data received from Slack is limited to what installation returns: workspace name and ID, channel name and ID, and the incoming webhook URL. This is retained only while the channel connection exists. No Slack message content or workspace member data is ever accessed or stored.
Data archiving and removal policy
Disconnecting a Slack channel deletes its webhook URL and connection record immediately. Deleting a Sentinel account removes all associated customer data, including any Slack connections. Routine database backups expire on a rolling schedule, after which removed data is no longer present in any backup.
Data storage policy
Customer data is stored in a managed database on dedicated cloud servers, with TLS for all data in transit. Sensitive values, including Slack webhook URLs, monitor credentials, and API tokens, are encrypted at rest at the application layer.
Data center location(s)
United States, Germany, Singapore
Data hosting details
United States (primary data storage is in Ashburn, VA; the monitoring probe servers in Germany and Singapore store no customer data).
Data hosting company
Hetzner
App/service has sub-processors
yes
Guidelines for sub-processors
App/service uses large language models (LLM)
no
Certifications & compliance
Data deletion request procedure
When a user requests deletion of personal data, or deletes their Sentinel account, we remove the account and all associated data: monitors, check history, incidents, notification settings, and any connected integrations including Slack webhook URLs. Deletion requests can also be sent to our support email and are handled by the operator directly, typically within 72 hours. Routine database backups expire on a rolling schedule, after which deleted data is no longer present in any backup.
HIPAA compliant
no
While this app may offer HIPAA compliance, Slack does not have a business associate agreement with any third-party application providers, including those in the Slack Marketplace, so you are responsible for validating the provider's compliance and executing an appropriate agreement before enabling.
Security
Supports Single Sign On (SSO) with the following providers
OAuth 2.0 sign-in with Google and GitHub
Supports Security Assertion Markup Language (SAML)
no
Has a dedicated security team
no
Contact for security issues
support@sentinel.rootstuff.io
Has a vulnerability disclosure program
no
Has a bug bounty program
no
Requires third party authorization/connections
no
Third party services used by this app
Built on the Laravel framework. Infrastructure and service providers: Hetzner (hosting), Cloudflare (DNS/CDN), Stripe (payments), Resend (email delivery), Twilio (SMS). Full list with purposes: https://sentinel.rootstuff.io/sub-processors
Uses token rotation
no