Terms of Service

These Terms of Service (the “Terms”) form a binding agreement between you and the operator of Dairo, identified in our Impressum(“Dairo”, “we”, “us”). By creating an account or using the Dairo API, SDKs, CLI, MCP server, dashboard, or website (the “Service”), you agree to these Terms. If you are using Dairo on behalf of an organization, you confirm you are authorized to bind that organization.

Dairo provides mail infrastructure (email and physical mail) for applications and AI agents: programmatic inboxes, outbound and inbound email, physical letter sending with tracking, delivery events, domains, and related APIs. We may add, change, or remove features over time. We will not make material breaking changes to a stable, generally available API without reasonable notice.

You must provide accurate account information and keep your credentials and API keys secure. You are responsible for all activity under your account and keys. Notify us promptly at [email protected] if you suspect unauthorized use.

You must be at least 16 years old and legally able to enter into this agreement. The Service is intended for professional and developer use.

You agree not to use the Service to:

• break any applicable law or third-party rights;
• send spam, unsolicited bulk email, or messages to recipients who have not consented or have unsubscribed;
• send phishing, malware, fraudulent, deceptive, or harassing content;
• forge headers, falsify the origin of a message, or impersonate others;
• probe, scan, overload, or attempt to bypass the security or rate limits of the Service or its subprocessors;
• resell or expose raw Service capabilities in a way that circumvents metering or these Terms.

We may suspend or terminate access for violations, and may remove or block content that breaches these Terms or threatens the integrity of the Service.

Email is a shared resource and its deliverability depends on every sender behaving well. When you send through Dairo you agree to:

• only message recipients who have a genuine relationship with you or have consented to be contacted;
• honor unsubscribe and opt-out requests promptly, and not message recipients who have opted out;
• keep bounce and complaint rates within reasonable limits; we may throttle or pause sending that generates excessive bounces or complaints;
• properly authenticate the domains you send from (SPF, DKIM, DMARC), and only send from domains you control;
• comply with anti-spam laws applicable to your recipients, including the GDPR/DSGVO, the German UWG, and equivalents.

We may enforce sending limits, require domain verification, and inspect aggregate delivery metrics to protect shared sending reputation.

You retain all rights to the content you send and receive through Dairo. You grant us the limited rights needed to operate the Service — to transmit, store, and process your content to deliver email and provide features you use. Our handling of personal data is described in our Privacy Policy.

You are responsible for ensuring you have the legal basis to process the personal data of your recipients and end users.

Paid plans and usage-based charges are billed through our payment processor in EUR. Fees are charged in advance or based on metered usage, as described at checkout or in your plan. Unless required by law, fees are non-refundable. We may change pricing with reasonable advance notice; changes do not apply retroactively to a paid period.

You are responsible for any taxes other than taxes on our income. If a payment fails, we may suspend paid features until the balance is settled.

We aim for high availability but do not guarantee uninterrupted service. Maintenance, third-party outages, and factors outside our control can affect the Service. Any formal service-level commitments, if offered, will be stated in a separate written agreement.

The Service relies on subprocessors such as AWS, Supabase, Polar, and Vercel, listed in our Privacy Policy. Your use of the Service is also subject, where relevant, to their acceptable use and abuse policies. We are not responsible for third-party services you separately choose to integrate.

Dairo, including its software, APIs, documentation, and brand, is owned by us and our licensors. These Terms do not grant you any rights in our intellectual property except the limited right to use the Service as permitted. Our SDKs are provided under their respective open-source licenses where indicated.

To the maximum extent permitted by law, the Service is provided “as is” and “as available”, without warranties of any kind, whether express or implied, including fitness for a particular purpose and non-infringement. This does not exclude warranties that cannot be excluded under applicable mandatory law.

To the extent permitted by law, we are liable without limitation only for damages caused intentionally or by gross negligence, and for injury to life, body, or health. For the breach of essential contractual obligations through slight negligence, our liability is limited to the foreseeable damage typical for this type of contract. Any further liability for slight negligence is excluded.

To the extent our liability is otherwise limited or excluded, the same applies to the personal liability of our legal representatives, employees, and agents. Mandatory liability under the German Product Liability Act remains unaffected.

You will defend and hold us harmless against claims arising from your content, your use of the Service in breach of these Terms, or your violation of law or third-party rights, to the extent permitted by applicable law.

You may stop using the Service and close your account at any time. We may suspend or terminate access for breach of these Terms, non-payment, or legal or security reasons. On termination, your right to use the Service ends; sections that by their nature should survive (such as billing owed, IP, disclaimers, and liability) survive.

We may update these Terms as the Service or the law changes. We will update the “last updated” date and, for material changes, give reasonable notice. Continued use after changes take effect means you accept the updated Terms.

These Terms are governed by the laws of the Federal Republic of Germany, excluding its conflict-of-laws rules and the UN Convention on Contracts for the International Sale of Goods (CISG). Mandatory consumer protection law of your country of residence remains unaffected.

Where permitted by law, the courts at our registered seat in Germany have jurisdiction for disputes arising from or in connection with these Terms.

Questions about these Terms: email [email protected]. Provider details are in our Impressum.