1. Core Service Providers
These providers support the application and may process customer or user information to deliver, secure, or operate it.
- Google Cloud
Application hosting on Cloud Run, managed database and object storage, operational infrastructure, and document extraction or AI processing when those features are used.
- Clerk
Authentication, sessions, and organization membership.
- Liveblocks
Collaborative drafts, comments, and presence.
- Inngest
Background workflow execution and event delivery.
- Resend
Service email delivery and customer-requested email intake.
- Better Stack
Operational logs and traces for monitoring and troubleshooting, where diagnostic export is enabled.
- Google Fonts
Webfont delivery, which involves browser requests and related network metadata.
2. Providers for Enabled Features
These providers may receive relevant information when the corresponding feature or connection is enabled. A listing does not mean every customer uses that provider.
- Vercel AI Gateway
Model-request routing when a selected AI feature uses the gateway.
- OpenAI
Selected AI and voice features.
- Anthropic
Selected AI features.
- Together AI
Selected AI model features.
- ElevenLabs
Selected voice features.
- Photon Spectrum
Customer-enabled iMessage, SMS/RCS, and Telegram channel relay.
- Telegram
Delivery and media for customer-enabled Telegram bot messages.
- Merge
Customer-authorized connections to supported business applications and synchronization of the data permitted by those connections.
- Browser Use
Browser sessions for customer-authorized portal connections, including access to the connected portal and relevant account records.
- 1Password
Credential-vault access for customer-authorized browser connections, limited to the configured vault and permitted sites.
- AgentPhone
Phone-number and SMS verification services for supported customer-authorized connection workflows.
- Stripe
Payment processing and customer-authorized financial connectivity.
- TaxJar
Customer-enabled sales-tax workflows.
- Track1099
Customer-enabled tax-form workflows.
- Lob
Customer-requested postal delivery.
- Brandfetch
Customer-requested company branding lookup.
3. Customer-Authorized Connections
Customers may connect platforms such as Intuit QuickBooks Online, Xero, Microsoft 365, or other supported business applications under the applicable authorization flows and terms. Data access depends on the permissions granted and the feature used. A connected platform's role depends on the service and the customer's relationship with that platform; a connection provider such as Merge may also process the authorized data.
4. Provider Controls and Locations
We evaluate providers based on the service and data involved and use contractual, technical, and organizational measures designed to limit processing to authorized purposes. Providers may process information in the United States and other countries where they operate. Where law requires a transfer mechanism or additional safeguards, Backline will use an appropriate contractual or legal mechanism.
5. Changes and Customer Terms
This list identifies providers supporting the application and its available features and can change as features and providers change. Customers who need advance-change notice, a data-processing addendum, specific transfer terms, or a provider review should contact Backline. A signed agreement controls over this general page.
6. Contact
Vendor-review and privacy questions may be sent to [email protected].