Ship agents this sprint, not after the platform project
LangChain is the framework most agents are written in. Connic is the EU-resident runtime that runs framework-style Python agents, with hosting, connectors, tracing, and approvals included.
LangChain earned its position. It is the most widely used agent framework (LangChain self-reports 90 million monthly downloads), the 1.0 release in October 2025 stabilized the API after years of churn, and the current 1.3 line is actively maintained under an MIT license. If you want full control over every layer of an agent, it is a defensible default. But a framework is code, not a home. After pip install you still need somewhere to run the agent, something to trigger it, traces to debug it, approvals to gate it, and a residency answer for whoever reviews your vendors.
LangChain's own answer to those questions is telling: the project's README points deployment at LangSmith Deployment, and managed traces, token and cost tracking, and evals live in LangSmith too, a paid product contracted through LangChain, Inc., a US company. Connic answers differently: an EU-resident runtime under a German contract that runs framework-style Python agents, with the production surface (connectors, traces, judges, guardrails, approvals, A/B testing) included in one platform and one region. Connic's Composer SDK is deliberately close to LangChain ergonomics, and its migrate tooling converts LangChain projects.
Feature Comparison
Connic vs LangChain, capability by capability.
Development Experience
Agent configuration
Connic uses simple YAML + Python. LangChain requires learning its chain/agent abstractions.
Learning curve
Connic: YAML + Python functions. LangChain: chains, agents, runnables, LCEL, and the LangGraph runtime underneath.
Local testing with hot-reload
Connic offers `connic test` with 2-5s hot-reload. LangChain requires custom dev setup.
Multiple LLM provider support
Both support OpenAI, Anthropic, Google, Azure, AWS Bedrock, and more.
EU & Compliance
Managed EU data residency
Connic hosts EU-only by default. N/A for a framework: your agents run wherever you host them, and LangChain's own deployment answer is LangSmith Deployment, a platform of US-based LangChain, Inc.
EU contract counterparty
Connic contracts through a German company. LangChain OSS has no counterparty at all; the moment you buy the vendor's platform, agreements run through LangChain, Inc. (US).
EU AI Act tooling
Connic ships execution logs, human approvals, and guardrails mapped to deployer obligations. In LangChain, Act evidence is middleware and logging you write and host yourself.
Full production stack in one EU region
Connic's runtime, traces, judges, guardrails, and approvals share one EU region. A LangChain stack is assembled from parts, each with its own hosting and residency answer.
Production Infrastructure
Managed hosting included
Connic deploys to managed infrastructure. LangChain has no hosting story; the README points at LangSmith Deployment, a separate paid platform.
Git-based deployments
Push to deploy with Connic. LangChain needs CI/CD pipeline setup.
Auto-scaling
Connic scales automatically. LangChain requires Kubernetes or cloud infra management.
Environment management
Connic has built-in dev/staging/prod environments. LangChain requires manual setup.
Secrets management
Built-in secure secrets per environment. LangChain relies on external solutions.
Integrations & Triggers
Webhook triggers
Built-in with Connic. LangServe provides basic HTTP but requires setup.
Scheduled jobs (Cron)
Native cron connector in Connic. LangChain needs external scheduler.
Message queues (Kafka, SQS)
Built-in connectors. LangChain requires custom integration code.
Email triggers
Native email connector. LangChain requires building custom integration.
Payment events (Stripe)
Native Stripe connector. LangChain requires webhook + custom code.
Observability & Evals
Managed tracing included
Automatic in Connic on every plan. Managed traces are absent from the OSS framework and pushed to LangSmith, a separate paid product.
Token and cost tracking included
Built into Connic. In the LangChain ecosystem this lives in LangSmith, not the framework.
Human approvals as a managed feature
Approvals are a platform feature in Connic. LangChain ships HITL and PII-redaction middleware as code you wire and host, not as managed features.
LLM-judge evals included
First-party judge service in Connic. Evals are absent from the OSS framework; LangChain points them at LangSmith.
A/B testing in production
Connic runs statistical A/B tests between agent versions in production. Not part of the LangChain framework.
Knowledge & RAG
Built-in vector storage
Connic includes managed vector storage. LangChain requires an external vector database.
Document ingestion
Both support PDF, images, text. Connic includes OCR automatically.
Semantic search
Built into Connic. LangChain needs vector store + retriever setup.
Pricing
Free to start
LangChain is MIT-licensed and free to use. Connic has a free tier; paid plans start at Developer €40/month.
Subscription doubles as usage credit
Connic plans are monthly usage credit (Developer €40, Pro €200, Enterprise custom) consumed at identical per-unit rates: €0.047/run, €0.00042/sec compute, €0.25/GB-month storage. A LangChain production stack bills across hosting, LangSmith seats, and whatever observability you add.
Not billed per seat
Adding teammates doesn't change a Connic bill. The framework is free, but LangSmith, where LangChain's managed features live, bills per seat plus usage.
The EU question
A framework cannot have a residency problem, which sounds reassuring until you notice it cannot have a residency answer either. Your LangChain agents run wherever you host them, and so does everything around them: the traces, the eval harness, the approval flow, the vector database. Each piece you assemble brings its own hosting decision, its own sub-processor list, and its own line in the DPO's review.
The vendor's answer does not close the gap. LangChain's own README points deployment at LangSmith Deployment, and its managed traces and evals live in LangSmith too. LangSmith does run an EU instance, but agreements run through LangChain, Inc., a US corporation, on every tier. Adopting the framework's first-party production path means adopting a US contract.
Connic's answer is structural: a German contract counterparty, EU-hosted regions by default, and the whole production surface, traces, judges, guardrails, approvals, inside that same region under one DPA. For how the whole field compares on this axis, read the EU data residency shortlist, or see how Connic maps its features to the EU AI Act.
Where LangChain genuinely fits
If you are building a highly custom LLM application and want control over every abstraction layer, LangChain is a strong choice: the largest ecosystem in the category, a stabilized 1.0 API, and in-framework middleware for human-in-the-loop and PII redaction when you want those behaviors expressed in code you own. Teams with platform engineering capacity and no fixed production deadline get real value from that control.
The calculus changes when the goal is agents in production rather than a platform project. Hosting, triggers, tracing, evals, and approvals are weeks of integration work in a self-assembled stack, and the framework's first-party shortcut runs through a US contract. Connic keeps the part of LangChain worth keeping, Python agents with framework-style ergonomics (the Composer SDK is deliberately close), and supplies the rest as an EU-resident platform. Existing projects convert: read the LangChain migration guide, or compare the best EU agent platforms for 2026.
Why teams choose Connic
What you get on day one — without writing connectors, wiring observability, or running infrastructure.
The Bottom Line
LangChain is a framework you build a platform around. Connic is the EU-resident platform that runs framework-style Python agents. Here's how to choose.
Use Connic when
- You want agents in production fast without DevOps overhead
- EU data residency and an EU contract counterparty are procurement requirements
- You need enterprise integrations (Kafka, SQS, Stripe, Email) day one
- You want tracing, evals, and approvals included, not in a separate paid product
- You want monthly usage credit rather than seats plus infrastructure
Use LangChain when
- You need fine-grained control over every abstraction layer
- You're building a highly custom LLM application, not production agents
- You already have DevOps expertise and infrastructure in place
- You want LangChain's large community integration ecosystem
- You're doing research or prototyping without a production timeline
Frequently Asked Questions
Does LangChain offer EU data residency?
Is LangChain free for production use?
Can I migrate a LangChain project to Connic?
Bring the workflow, trigger source, compliance constraints, and deployment path you are evaluating. We will help separate what LangChain should handle from what belongs in a managed agent runtime.
Compare with SalesStill shortlisting? Here are the others.
Head-to-head comparisons against the platforms most teams weigh alongside Connic. For the full field, survey the 2026 agent deployment platform landscape.
Connic vs AutoGen
Microsoft's multi-agent framework, now in maintenance mode with the Agent Framework as its successor. Either way: a framework you host, not a runtime with a home.
Connic vs CrewAI
Role-based agent orchestration with YAML config. Same philosophy as Connic — Connic adds first-party connectors and managed hosting in every plan.
Connic vs Self-Hosting
Running agents on your own Kubernetes or cloud. Total control — and the full DevOps, on-call, and compliance bill.
Connic vs Zapier Agents
No-code agents on Zapier's action catalog. Fast for business-user automation — no EU data storage, and short on the observability production agents need.
Connic vs LangSmith Deployment
LangChain Inc.'s managed runtime for LangGraph agents (renamed from LangGraph Platform in October 2025). The right home if you've picked LangGraph — a tight fit if you haven't.
Connic vs Vercel
Agentic infrastructure with the eve framework and AI Gateway. Compute can run in Frankfurt — Gateway logs, workflow state, and queue state cannot. Connic keeps every plane in the EU.