Langdock and Custodos compared
Langdock and Custodos follow the same basic idea: leading models from several providers behind one login, designed for the GDPR, with no training on your data. What differs is the processing location, the choice of plan per person and how closely the product is cut to the DACH region.
- On models there is little between them: models from OpenAI, Anthropic, Google and Mistral run on both platforms.
- Langdock hosts in the EU on Microsoft Azure. Custodos stores your data in Switzerland and processes in the EU or in Switzerland; you choose the region.
- With Custodos you choose the plan per person and combine Mini, Business and Max in one workspace. Langdock lists €23.20 per user per month billed annually on its Core plan, €29 billed monthly, both excl. VAT.
- Langdock is certified to ISO 27001 and SOC 2 Type II. Custodos does not currently hold these certifications.
Custodos and Langdock side by side
Figures for Langdock come from the provider's own pricing and security pages, both linked below.
Model choice
- Custodos
- GPT, Claude, Gemini and Mistral, freely selectable per task
- Langdock
- Equally broad: models from OpenAI, Anthropic, Google, Mistral and Meta.
Storage and AI region
- Custodos
- Stored in Switzerland; AI processing in the EU or Switzerland, as you choose
- Langdock
- EU, operated on Microsoft Azure. Larger deployments can additionally run in your own cloud or on-premise.
Switzerland as a region
- Custodos
- Yes, explicitly selectable
- Langdock
- Not listed as a region on the security page.
Training on your data
- Custodos
- No
- Langdock
- No. Customer data is never used to train models according to the provider.
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Price per seat
- Custodos
- Chosen per person: €12 (Mini), €24 (Business) or €72 (Max) per seat per month billed annually, €15/€30/€90 billed monthly, excl. VAT
- Langdock
- Core plan: €23.20 per user per month billed annually, €29 billed monthly. Work plan: €31.20 or €39. A Max seat with five times the usage costs €99 or €119 on Core. All prices excl. VAT. The pricing page also lists volume pricing from 51 seats.
Governance
- Custodos
- SSO, central roles and permissions and an activity log with every seat
- Langdock
- SSO, SCIM and SAML included in every plan, according to the pricing page. The governance package is included on the Core plan until 1 January 2027, on the Work plan without that limit.
Workflows
- Custodos
- No separate workflow feature; recurring tasks run through agents and saved prompts
- Langdock
- A starter allowance is included; larger packages cost €449 to €999 per workspace per month billed annually, €539 to €1,199 billed monthly, excl. VAT.
Free trial
- Custodos
- 7 days
- Langdock
- 7 days, no credit card, with €5 in model credit.
Professional secrecy in DACH
- Custodos
- Designed for § 203 of the German Criminal Code, § 121 of the Austrian Criminal Code and Art. 321 of the Swiss Criminal Code
- Langdock
- No explicit reference to these provisions on the security page.
Provider
- Custodos
- Stellar GmbH, Cham (Switzerland)
- Langdock
- Langdock GmbH, Berlin (Germany).
Prices as of November 2026, other details as of August 2026. Figures for the other provider come from that provider's own sources, linked below. Prices and features change; check both before you decide.
Where the difference shows in daily work
Two similar products: the decision turns on four points.
Switzerland is not a footnote
For organisations based in Switzerland or serving Swiss clients, the processing location is rarely negotiable. Custodos offers Switzerland as a region, not only the EU.
Cut to three legal systems
§ 203 of the German Criminal Code, § 121 of the Austrian Criminal Code, Art. 321 of the Swiss Criminal Code: Custodos names the provisions professional secret holders are measured against and builds the product around them.
Mix plans per person
Each person gets the plan that fits how they work: Mini for occasional use, Business for everyday work, Max for intensive use. All three run in one workspace with the same features. Max costs €72 billed annually (€90 monthly), Langdock's Core Max seat €99 (€119), each excl. VAT; the usage budgets are not identical.
Supervisory requirements built in
Banks and insurers receive documentation on the outsourcing requirements of BaFin and MaRisk, the EBA, the FMA and FINMA, for review by your own compliance function.
- When Switzerland is involvedA Swiss base, Swiss clients or an internal rule on the processing location: then the choice between the EU and Switzerland is not a convenience but the precondition for the project starting at all.
- When professional secrecy sets the frameLaw firms, fiduciary companies, practices: Custodos is designed for professions under a statutory duty of confidentiality and names the provisions of all three countries.
- When not everyone uses it equallyThe workshop, the field team and the legal department rarely need the same allowance. With Custodos you choose the plan per person and combine Mini, Business and Max in one workspace, without anyone giving up features.
Custodos supplies the technical preconditions for handling your data confidentially. The legal assessment in each individual case remains with your organisation.
What speaks for Langdock
Langdock is the more mature provider, and that deserves to be said here. The company has been on the market longer, runs larger deployments and has a correspondingly broader feature set. If you are based in Germany, have no Swiss requirement and want to roll out a thousand seats, Langdock is a very good choice.
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Concretely, Langdock is ahead of us on these points:
- Certification to ISO 27001 and SOC 2 Type II. Custodos does not currently hold these certifications; if your procurement requires them, that is a knock-out criterion.
- A very broad model catalogue including open models and the option to bring your own provider API keys.
- Mature deployment options up to single-tenant, bring-your-own-cloud and on-premise via Kubernetes.
- A dedicated workflow product with high allowances for organisations automating at scale.
- Volume pricing: the pricing page lists it from 51 seats.
Sources
- Langdock: Pricing · Langdock GmbH
- Langdock: Security · Langdock GmbH
- Langdock: Imprint · Langdock GmbH
All product and company names mentioned are trademarks of their respective owners. Custodos has no business relationship with the providers compared here; this comparison is based solely on publicly available information.
Frequently asked questions
What separates Custodos and Langdock most clearly?
The processing location. Langdock hosts in the EU on Microsoft Azure; Switzerland is not listed as a region on its security page. Custodos stores your data in Switzerland and processes in the EU or in Switzerland, and you make that choice. After that come the choice of plan per person (Mini, Business or Max in one workspace) and the explicit fit to professional secrecy in Germany, Austria and Switzerland.
Is Langdock GDPR-compliant?
Langdock hosts in the EU, provides a data processing agreement, states that it does not use customer data for training and is certified to ISO 27001 and SOC 2 Type II. Those are solid technical and organisational preconditions. Whether your specific deployment complies with the GDPR depends, as with any platform, on your own assessment; the same applies to Custodos.
Is Custodos cheaper than Langdock?
Not across the board. On the Business plan a Custodos seat costs €24 per month billed annually and €30 billed monthly; Langdock lists €23.20 or €29 per user on its Core plan, and its pricing page lists volume pricing from 51 seats. For intensive use our Max seat costs €72 or €90, Langdock's Core Max seat €99 or €119; the usage budgets of the two providers are not identical. People who only use it occasionally get the Custodos Mini plan at €12 or €15, with the same features and a smaller usage budget. All prices excl. VAT. Compare both offers against your actual usage, not against the list price.
Can I move from Langdock to Custodos?
Yes. Both platforms are built model-agnostically, so the way you work stays largely the same: chat and agents exist in Custodos too; there is no separate workflow feature like Langdock's. A move makes most sense when Swiss processing, a reference to professional secrecy or plans per person is what tips the decision. We will walk through the migration with you.
More comparisons
Related reading
- How Custodos protects your data: storage location, encryption and governance in detail
- What Custodos costs: the four plans with published prices
- Data sovereignty and Swiss hosting: what the processing location means in practice
- AI for fiduciaries and tax advisers: handling accounts and payroll confidentially