Verdict: For EU organisations, Sluis is the better choice because it is easier to adopt (sign in with Microsoft, Google or Apple, build an agent by describing it, apps on every platform, no seat licences), clearer to run (one policy, one audit trail grouped per request, one usage bill at provider list price plus 10%), safer for data (reversible pseudonymization and EU-only routing enforced on each request, a hash-chained audit log you can verify offline) and fuller as a workspace (versioned Skills, private and shared Knowledge, spreadsheets and presentations, agent memory, scheduled agents, many model providers in one place).
The short version
Sluis is an Amsterdam-based AI workspace and governed gateway, with the gateway built in Rust. You sign in with Microsoft, Google or Apple, build an agent by describing it, and use versioned Skills, private or shared Knowledge, spreadsheets and presentations in one place, with apps for web, macOS, Windows, Linux, iOS and Android. It uses models from many providers, is hosted in the EU, is ISO 27001 certified, and has an optional self-hosted data plane.
Langdock is a Berlin-based, model-agnostic AI platform: Chat, custom Agents, Workflows, Integrations and an API. Companies buy seats, optionally add Workflows, Governance or API, and use models from multiple providers. It is hosted via Microsoft Azure inside the EU in its multi-tenant setup, and it also offers dedicated and self-managed deployment for large customers.
Both are European and both state ISO 27001 certification. The differences that decide it are the pricing model, what sits between your data and the model provider, and how audit works. On each of those, Sluis comes out ahead. For the wider field, see European ChatGPT alternatives for organisations.
At a glance
| Sluis | Langdock | |
|---|---|---|
| What it is | AI workspace plus governed API gateway | AI workspace: Chat, Agents, Workflows, Integrations, API |
| Models | Many providers, plus bring-your-own keys and custom OpenAI-compatible endpoints | Many providers, plus bring-your-own keys |
| Pricing | Provider list price + 10%, no seat fees; bring-your-own-key at €0.50 per 1M tokens | Per seat: Business €25 per user per month, Business Max €99, Enterprise on request; Workflows and API are add-ons |
| Data location | Managed service hosted in the EU; API routing defaults to EU-only, set by policy and enforced per request | Multi-tenant SaaS on Azure in the EU; single-tenant and own-infrastructure options for larger deployments |
| Certifications | ISO 27001 certified | ISO 27001 and SOC 2 Type II stated |
| Sensitive-data handling | Detects and reversibly pseudonymizes sensitive values before dispatch | Encryption in transit and at rest, no training on customer data |
| Audit | Tamper-evident hash-chained audit log, verifiable offline | Admin analytics, agent governance add-on |
| Sign-in | Entra ID, Google, Apple SSO; SAML and SCIM on request (enterprise) | SSO, SCIM and SAML listed under Business |
| Self-hosted | Optional Sluis Edge: the data plane as one binary on your infrastructure | Single-tenant SaaS from 2,000 seats; own cloud and on-premises from 5,000 seats |
| Best fit for EU organisations | Sluis |
Pricing
Sluis has no subscription and no seat fee, so there are no licences to assign. Managed model usage costs provider list price plus 10%. With your own provider keys, or a custom OpenAI-compatible endpoint, Sluis charges €0.50 per 1M input plus output tokens, and the provider bills separately. Self-service is prepaid, with a €25 minimum credit purchase, no free tier and payment-method surcharges. The Agent Harness for coding agents adds €16.50 per active managed provider account per month, plus VAT. See the pricing page. Workloads, budgets and the spend overview in the console show one usage-based bill.
Langdock's pricing page lists a 7-day free trial, a Business plan at €25 per user per month (excluding VAT) for the Standard seat, a Business Max seat at €99 with five times more usage, and Enterprise on request. Whether model usage is included is shown as a toggle on the page, so check which variant you are pricing. Workflows (starting at €539 per workspace per month for 40k runs), the Governance add-on and the API add-on are separate. The Governance add-on is listed as free until 1 January 2027, then priced per user.
A usage price is cheaper for light or uneven use and can cost more than a flat plan for very heavy users. A seat price is easy to budget but charges for every seat whether used or not. Model the numbers for your headcount.
Data residency and protection
Sluis is hosted in the EU and ISO 27001 certified, and its strength is the data path. API routing defaults to EU-only and is enforced per request; organisations decide whether to allow other jurisdictions or require EU-owned providers, and these are separate settings, because an EU region does not imply an EU-owned provider. Before a request leaves, Sluis detects PII and secrets (60 built-in detectors, plus optional name recognition) and applies policy: block, mask, log, or reversible pseudonymization with typed tokens such as «EMAIL_1», restored in the response. Retention controls decide how long content is kept. Detection is not a guarantee that every sensitive value is found, and using Sluis does not by itself establish GDPR compliance.
Langdock states that its multi-tenant SaaS runs on Azure servers inside the EU, that the whole application and most models (configurable) can be hosted in the EU, and that customers may deploy in their own infrastructure. It states ISO 27001 certification, SOC 2 Type II audits, GDPR alignment, encryption in transit (TLS 1.2+) and at rest (AES-256), and that customer data is never used to train models. Langdock's published security page does not describe pseudonymization of prompts; if that matters, ask them directly.
Admin and governance
Sluis offers per-workload budgets and limits, residency and provider-ownership policy, a scope guard that can refuse out-of-scope model calls, deny-by-default MCP tool grants and a request-grouped, hash-chained audit log. Members sign in with Microsoft Entra ID, Google or Apple, can add an authenticator app or passkey, and owners can require two-factor. SAML and SCIM are available for enterprise contracts on request.
Langdock offers workspace-level permissions, integrations that mirror source-tool permissions, optional analytics, and a Governance add-on to review, approve or disable agents and run compliance checks, with templates for the EU AI Act and GDPR. SSO, SCIM and SAML are listed under the Business plan, which it lists for up to 1,000 users.
Workspace functionality and integrations
Sluis builds agents and Skills by describing them in a chat, keeps Skills versioned, runs scheduled agents and sub-agents, remembers context through agent memory, applies a house style to documents, and supports spreadsheets and presentations, private or shared Knowledge, a reasoning level per chat and image generation where policy allows. External tools connect through MCP under the same gate. Sluis's workflow automation is agent-based; a visual workflow builder is available on request for enterprise contracts.
For developers, Sluis exposes OpenAI-compatible and Anthropic Messages endpoints, so existing applications and coding agents such as Claude Code, Codex and Cursor connect by changing a base URL. Langdock also offers an API, as a paid add-on.
Langdock lists Workflows, an integrations catalogue, an Excel add-in, an Outlook add-in, desktop and mobile apps, and agent-building for business teams.
Who might still pick Langdock
- You want a seat-priced assistant with a broad integration catalogue, a visual workflow builder and add-ins for Excel and Outlook.
- You need SOC 2 Type II reporting now.
- Predictable per-user budgeting matters more than per-token savings.
- A German vendor with Azure-hosted EU infrastructure fits your procurement.
Our verdict
Sluis wins for EU organisations: easier to adopt (one sign-in, one workspace, no seats), clearer to run (one policy, one audit trail, one usage bill) and safer for data (pseudonymization before dispatch, EU-only routing, a verifiable audit chain, optional self-hosting through Sluis Edge). See Sluis Workspace and pricing.
FAQ
Are Langdock and Sluis both hosted in the EU?
Yes. Langdock states multi-tenant SaaS on Azure in the EU; Sluis states a managed service hosted in the EU with EU-only API routing by default. Check each vendor's subprocessor list for the exact providers.
Can I bring my own model keys?
Both support it. In Sluis, bring-your-own-key and custom OpenAI-compatible providers cost €0.50 per 1M input plus output tokens in Sluis fees, plus the provider's own charges.
Which one has more certifications?
Langdock states ISO 27001 and SOC 2 Type II. Sluis is ISO 27001 certified. Ask each vendor for current reports.
Which is cheaper for 100 employees?
It depends on usage. At Langdock's listed €25 Business base price, 100 Standard seats come to at most €2,500 per month excluding VAT, before volume discounts and add-ons. Sluis has no seat fees; the cost is provider list price plus 10% on what is actually used, so idle seats cost nothing.
Can I run either on my own infrastructure?
Langdock offers single-tenant SaaS from 2,000 seats and own-cloud or on-premises deployment from 5,000 seats. Sluis offers Sluis Edge, an enterprise-only data plane that runs as one binary on your servers, managed from the same console, with a flat annual licence per gateway.