Terms of service
The plain-language agreement for using heydessa.ai. Last updated 16 July 2026.
1. Who we are
heydessa.ai is operated by Dessa, a product of Trengo B.V., registered in Utrecht, the Netherlands (Chamber of Commerce: 72043687). These terms govern your use of the Dessa platform, website and related services.
2. Your account
You are responsible for your account credentials and for the accuracy of the information you provide. You must be authorized to act for the business you connect to Dessa.
3. The service
Dessa is an AI support agent that resolves customer conversations on your behalf, within guardrails you configure. You remain responsible for the policies you set, the knowledge you provide and the actions you authorize Dessa to take on your systems.
4. Pricing and billing
You pay per resolved conversation as described on the pricing page. Conversations handed off to your team are free. Fees are billed monthly in arrears; trials are free and end automatically unless you convert.
5. Your data
Your data stays yours. We process it only to provide the service, under our data processing agreement. Your conversations never train models used by other customers. Full details are in our privacy policy and trust center.
6. Acceptable use
Do not use Dessa to deceive end users about whether they are talking to an AI, to send unsolicited messages, or for any unlawful purpose. We may suspend accounts that put end users or the platform at risk.
7. Availability and support
We target 99.9% monthly uptime and publish status updates during incidents. Enterprise plans include contractual SLAs; details are agreed in your order form.
8. Liability
To the extent permitted by law, our aggregate liability is limited to the fees you paid in the twelve months before the claim. We do not exclude liability that cannot lawfully be excluded.
9. Termination
You can cancel anytime; service runs to the end of the billing period. On termination we delete your data per the retention settings in your agreement, except where law requires otherwise.
10. Changes and contact
We may update these terms with 30 days' notice for material changes. Questions go to legal@heydessa.ai or through the contact page. Dutch law applies; courts of Amsterdam have jurisdiction.
Questions about these terms?
Our team answers legal and procurement questions quickly — usually within a business day.