Custom AI agents. Built to run inside your business.

We move agentic AI past the prototype: production agents with multiagent orchestration, guardrails, monitoring, and the integration into existing systems most pilots skip. We're a full-stack AI and product engineering agency in Berlin and Sydney.

Agentic AI workflow services · Multiagent architecture · Agent orchestration · Agent governance & security · LLM integration · RAG systems

Book a Discovery Call
12+
Production AI agents shipped
6-12wk
Pilot to production
100%
Code, prompts, and weights transferred to client

Multiagent Systems & Agent Engineering

Production-grade agents that plan, decide, and act under guardrails. Multiagent architecture and orchestration integrated with the tools your team already uses.

  • Customer service and support automation
  • Document processing and extraction
  • Engineering function agents

Agent Governance & Security

Production agents are services, not prompts. Guardrails, evals, and audit trails so your team sees what the agents did and why.

  • Regulated industries
  • Audit trails and compliance evidence for security reviews
  • Production hardening for pilots that need to ship

Agentic Workflow Automation

Agents alongside humans, not in place of them. Human-in-the-loop surfaces and operation centers where your team approves, escalates, and oversees what the agents do.

  • Approval chains and decision routing
  • Document and case workflows with exception handling
  • Operations dashboards for human–agent oversight

selected case studies

Our recent work on AI & Agents.

European RegTech Startup
SaaS & Platforms

Automating regulatory and supplier diligence for European cosmetic brands. 75% saved per audit

Source.app
SaaS & Platforms

Building a production-ready marketing attribution platform in 11 months

View all case studies

The right tools for the right problems.

LLMs & Foundation Models

  • Anthropic
  • OpenAI
  • AWS Bedrock
  • Mistral

Vector Databases & Search

  • Pinecone
  • pgvector
  • Elasticsearch
  • Supabase Vector

Orchestration & Agents

  • LangChain
  • CrewAI
  • Vercel AI SDK
  • N8N

Multi-Modal & Gen-Media

  • ComfyUI
  • Suno.ai
  • Synthesia
  • Adobe Firefly
  • ElevenLabs

Cloud & DevOps

  • Amazon Web Services
  • Google Cloud Platform
  • Cloudflare
  • Vercel
  • Supabase

Observability & Evaluation

  • Langfuse
  • CloudWatch
  • PostHog

SELECTED clients

Behind every logo is a system we engineered, shipped, and scaled.

Fasten Teams certifications and partner badges

Let's talk

Ready to put AI to work?

Tell us where you are and where you want to be. We'll map the route, the team, and the timeline.

FAQ

What people ask about Fasten Teams.

Fasten Teams is an end-to-end digital product and growth studio with offices in Berlin and Sydney. We architect the software and engineer the growth — building web, mobile, AI, and cloud products, then scaling them with performance marketing, technical SEO, and brand work. One elite team, one unified strategy.