Terms of Service

These Terms govern the relationship between you (“Client”) and the operator of the Tessera Optimize Layer (“Tessera,” “we,” “us”). They cover use of tesseraai.io (the public landing), ledger.tesseraai.io (the operator and sponsor dashboard), and the Tessera proxy infrastructure that sits in your LLM request path.

By creating a Tessera account or routing production traffic through the Tessera proxy, you accept these Terms in full. There is no separate engagement contract to sign for a self-serve paid tier — these Terms plus the DPA are the entire agreement. Enterprise customers may execute a custom MSA addendum in addition to these Terms.

Tessera is the trade name of Fintechagency OÜ, a private limited company incorporated in the Republic of Estonia (registry code 16638667, registered office Vesivärava tn 50-301, 10152 Tallinn). All invoices, money flows, and contractual remedies reference Fintechagency OÜ. Full corporate details on the Imprint.

The Tessera Optimize Layer is a substrate proxy that sits between your application and your LLM provider. On every request we apply four moves:

• · Auto-route — when a cheaper model passes your golden-set eval, we route to it. Five percent of routed requests are canary-sampled against the original model.
• · Auto-cache — identical requests within your cache TTL return cached responses.
• · Auto-compress — when our heuristic whitespace + structural compression preserves quality on your eval, we send a tighter prompt upstream.
• · Auto-batch — when a workload is tagged batch-eligible, we queue and fire as a batch.

Savings are measured directly from Tessera proxy logs — not inferred from your upstream billing CSV. Every dollar attributed to Tessera traces to a specific request and a specific pricing-catalog snapshot version.

Paid tiers are a flat monthly subscription. The price is determined by the volume of gross monthly tokens you submit to the Tessera proxy — measured before any optimisation. The subscription fee is independent of the savings Tessera produces; you keep one hundred percent of measured savings.

• · Free Sandbox — up to 60 million tokens per calendar month, $0 fee, full mechanic stack active (route + cache + compress + batch). Same feature set as every paid tier; only the token cap differs. Hard cap at quota; on exhaustion the proxy returns HTTP 402 with an upgrade pointer until the next month resets. Self-serve signup at ledger.tesseraai.io/signup-dev — email plus acceptance of these Terms, no card required.
• · Starter — $199 per month, up to 1 billion gross monthly tokens submitted to the proxy.
• · Growth — $999 per month, up to 5 billion gross monthly tokens submitted to the proxy.
• · Scale — $3,999 per month, up to 20 billion gross monthly tokens submitted to the proxy.
• · Enterprise — custom pricing for volumes above 20 billion gross monthly tokens, available with a custom MSA addendum (invoice billing NET-30/45/60, custom SLA). Contact contact@tesseraai.io.

All paid tiers are billed via Stripe. There is no fixed term, no minimum commitment, and no early-exit fee — see §16. If your gross monthly token volume exceeds a tier quota, you move to the next tier; Tessera notifies the account owner before any tier change takes effect.

Paid tiers are a flat monthly subscription priced by the gross monthly tokens you submit to the proxy (before optimization), billed via Stripe. The subscription fee recurs on the same calendar day each month and is charged in advance to the payment method on file. Tessera measures and reports the savings produced — audit-immutable, traceable to each request and pricing-catalog snapshot — but the subscription fee is independent of those savings; the savings figure is provided as ROI evidence, not as a billing basis. A monthly invoice PDF is generated automatically for your accounting records.

If a subscription charge fails, Tessera notifies the account owner and retries per the Stripe dunning schedule. During an unresolved payment failure the proxy continues forwarding your requests to your upstream provider in passthrough mode — your end users experience no service interruption — and Tessera may suspend the optimizations until the subscription is brought current.

You may cancel your subscription at any time from the dashboard or on request to contact@tesseraai.io. Cancellation takes effect at the end of the current billing month; the subscription fee already paid for the current month is not pro-rated or refunded, save where required by applicable law.

For each request that gets routed, cached, compressed, or batched, Tessera records both the actual incurred cost and the counterfactual cost (the cost if Tessera had passed the request through unaltered). Measured Savings on that request equal the difference. Aggregate Measured Savings in a window equal the sum across all in-scope workloads in that window. Measured Savings are reported to you as audit-immutable ROI evidence; they do not determine the subscription fee (see §4 and §5).

• · Cost calculations use the pricing-catalog row active at the moment of the request — never client-side defaults, never Tessera memory.
• · Workloads tagged regulated (HIPAA, PCI-DSS, SOC 2 in-scope) never auto-route. Compliance gate is enforced at the code level.
• · Provider price moves, unrelated workload shrinkage, and seasonal volume effects do not enter the Measured Savings calculation — only the actual vs. counterfactual delta per request.
• · Monthly Joint Readings record the pricing-snapshot version identifiers active during the period so historical computations remain reproducible.

Tessera guarantees that quality preservation (canary-measured against the Client's golden-set eval) stays at or above 0.95 across in-scope workloads. A three-consecutive-day breach triggers automatic disabling of auto-routing on the affected workload plus a credit equal to 10% of your monthly subscription fee, applied to your next invoice for the period of the breach. You are notified by email and the breach is recorded in the audit log.

You have an always-available kill-switch in the operator dashboard, both account-wide and per-workload. When engaged, the proxy bypasses all four optimizations and forwards requests as pure passthrough. The kill-switch does not change your subscription fee, which is determined solely by gross monthly tokens submitted to the proxy. Pause is reversible at any time without notice or fee. This right is irrevocable and survives any other provision of these Terms.

You agree not to use the Tessera proxy for any unlawful purpose, to circumvent any upstream provider's acceptable-use policy, to send prompts or receive completions that violate applicable law, or to attempt to reverse-engineer the proxy infrastructure. Tessera may suspend service if it has reasonable belief that your usage materially breaches this clause, with at least 24 hours' written notice except where immediate suspension is required by law or by the upstream provider.

Tessera receives no affiliate revenue, referral fees, kickbacks, sponsorships, or any other compensation from any AI provider, gateway vendor, observability platform, or other third party we may recommend in the course of operating the proxy. Client subscription fees are our only income. If this ever changes, we will disclose it in writing in advance and allow affected Clients to terminate without penalty per §16.

All Client-provided data, workload metadata, prompts forwarded through the proxy, and findings produced for you are confidential. We do not republish, share, or use Client data outside the scope of operating the proxy and computing your fee. Anonymised aggregate insights may be referenced in our public writing only after removing all Client identifiers, workload names, prompt content, and proprietary configuration.

The Tessera brand, the proxy software, the recommendation engine, the pricing-catalog methodology, and proprietary templates remain the property of Fintechagency OÜ. Findings, baselines, readings, and recommendations delivered to you may be used internally by your team for any purpose without further licence. Republishing Tessera-prepared documents externally without prior written permission is prohibited.

Aggregate Tessera liability under these Terms is limited to the fees actually paid by you to Fintechagency OÜ in the twelve months preceding the claim, with no minimum or floor. We are not liable for indirect, consequential, or business-decision damages. You retain sole responsibility for evaluating recommendations before implementation and for testing routed traffic against your own quality criteria. Nothing in this clause limits liability for fraud, wilful misconduct, or any liability that may not be excluded by applicable law.

Processing of personal data is governed by the Tessera Privacy Policy and the Tessera Data Processing Agreement, which forms an integral part of these Terms and is incorporated by reference. By accepting these Terms, you also accept the DPA.

Tessera's value comes in part from observing what works across many customer workloads. By using the Service you agree that anonymized, content-free signals derived from your requests may be aggregated with similar signals from other customers to improve routing decisions, cache effectiveness, and quality benchmarks across the platform.

What we aggregate (anonymized. No prompt content, no completion content, no identifiers):

• Prompt-shape fingerprints (described in detail at /security#prompt-fingerprint): role-sequence pattern, presence of code fences or JSON blocks, coarse token-count band, and an embedding-cluster identifier (an integer 1..N referring to a centroid of historical anonymized prompts).
• Routing outcomes (which model was chosen, what eval score it received).
• Cache hit/miss patterns (which cache layer fired, on what fingerprint).
• Provider response status patterns (success / rate-limited / error rates per provider).

What we never aggregate or share: your prompt content, your completion content, your API keys, your customer-identifiable metadata, or anything that would let another customer identify your workload.

Opt-out: you may opt out of cross-customer aggregation at any time from /portal/settings/privacy. When opted out, (1) your prompt fingerprints continue to be recorded in your own audit ledger (visible at /portal/audit) for your workload analysis and billing transparency; (2) your data is excluded from any cross-customer learning corpus, model training, or aggregate statistics shared in our documentation or research outputs; (3) existing aggregated data that included your contributions before opt-out is not removed retroactively (aggregations are computed continuously; once data enters a cluster centroid, removing it would require recomputation of historical analyses).

Enterprise carve-out: Enterprise customers (annual contract value ≥ $50,000 OR signed Master Services Agreement) are opted out by default. Contact contact@tesseraai.io to confirm.

Provenance: this clause is enforced by the database flag clients.contributes_to_cross_customer_intelligence. The Tessera worker checks this flag on every request before contributing the request's fingerprint to cross-tenant aggregation. The flag is auditable from your dashboard.

These Terms remain in force while you maintain a Tessera account. There is no fixed term, no minimum commitment, and no early-exit fee on any paid tier. Either party may terminate at any time by closing the account (you) or by giving thirty days' written notice (us, save where immediate termination is required by acceptable-use breach, law, or regulator order).

On termination: cancellation of any paid subscription takes effect at the end of the current billing month per §5, and the subscription is not renewed thereafter; the proxy continues passthrough mode for a thirty-day wind-down so you can swap back to direct provider calls without service disruption.

We may update these Terms from time to time. Material changes (anything affecting your fee structure, kill-switch right, quality SLA, refund mechanism, or data processing) are notified by email to the account owner at least thirty days before taking effect. Continued use of the proxy after the effective date constitutes acceptance of the updated Terms. If you do not accept, you may terminate per §16.

These Terms are governed by the laws of the Republic of Estonia, save where mandatory provisions of the Client's jurisdiction apply. Disputes are first resolved through good-faith negotiation between authorised representatives — write to contact@tesseraai.io within fifteen calendar days of the issue arising. If negotiation fails, disputes are resolved by arbitration in Tallinn, Estonia, under the rules of the Arbitration Court of the Estonian Chamber of Commerce and Industry, conducted in English. The prevailing party is entitled to recover reasonable legal fees and arbitration costs.

Each Monthly Joint Reading records the Measured Savings figure for the period as audit-immutable ROI evidence; it does not determine the subscription fee (see §4 and §5). You have fifteen calendar days from issuance to dispute the figure in writing to contact@tesseraai.io. Tessera re-derives the disputed figure from the immutable audit record and the pricing-catalog snapshots active during the period. Resolution targets ten business days from receipt of dispute, extendable by mutual agreement.

Questions about these Terms, your account, or the practice: write to contact@tesseraai.io.