Custom AI agents. Built for your systems.
Custom AI agents, copilots, and multi-agent systems that live inside your real stack — CRM, EHR, ERP, data warehouse, internal tools. Production-grade from day one, with guardrails, evals, and observability built in. You own the model, the data, and the IP.
Project Approaches
Customer experience agents
Tier-1 deflection, account lookup, refund and order-status workflows, agent-assist for human reps. Built into your own stack.
Sales and revenue agents
Lead qualification, meeting prep, CRM hygiene, account research, proposal drafting. Integrated with any CRM.
Operations and back-office agents
Document intake, invoice processing, claims review, contract triage, vendor onboarding. Wired into NetSuite, QuickBooks, DocuSign, your ERP and CLM.
Internal copilots and knowledge agents
Q&A grounded on your docs, code, and tickets. Engineering, HR, and policy copilots. Built on Confluence, Notion, Slack, Jira, GitHub, and your data warehouse.
Buy vs build
Your processes are custom. Your data is custom. The right agent should be too. Off-the-shelf platforms ship fast but stop where your edge cases start.
| Off-the-shelf platform | Custom-engineered agent with Diffco | |
|---|---|---|
| Fit to your workflow | Generic | Built to your exact process |
| Integration depth | What the vendor supports | Anything your stack supports |
| Data & IP | Shared with vendor | Yours |
| Model flexibility | Vendor-locked | OpenAI · Anthropic · Azure · open models |
| When it wins | Generic use case, nice demo | Workflow is your edge, regulated data, production |
Tech stack
Models
OpenAI
Anthropic
Azure OpenAI
AWS Bedrock
Gemini
Llama
Mistral
DeepSeek
Qwen
open-weight
Frameworks
LangChain
LangGraph
LlamaIndex
CrewAI
AutoGen
Voice
ElevenLabs
Deepgram
OpenAI Realtime
Twilio
Retrieval
Pinecone
Weaviate
pgvector
Qdrant
Runtime
Vercel AI
Cloudflare Workers AI
AWS
GCP
Azure
Evals & Obs
LangSmith
Helicone
Arize
custom eval harnesses
Don’t see the tech stack you are looking for?
Our team has experience finding candidates for custom requirements and various tech stacks. Please contact us, and let’s find you a perfect candidate.
How we build
A delivery method built for the AI era, not retrofitted to it.
We run every agent project through Production-Ready AI Engineering — senior engineers and AI agents in the same delivery loop, with evals and human review built in.
- 01
Discover
Human + AIWorkshops and stakeholder interviews with AI in the room. It cross-verifies inputs across calls, docs, and Slack threads — flagging blind spots, edge cases, and contradictions humans miss.
- 02
Plan
AIAI decomposes the work, picks architecture, models, and tools. Surfaces risks, costs, trade-offs — and conflicts between stated requirements — before they become bugs.
- 03
Align
HumanYou review and approve. Every decision is logged — an auditable trail before any code is written. No black box, no scope drift.
- 04
Build
AIAI agents execute the approved plan inside engineered guardrails. Senior engineers steer and unblock. Sprint cadence with working artifacts, not status decks.
- 05
Validate
Human + AIThree independent layers on every release candidate: automated evals, senior code review, and dedicated Human QA — manual and exploratory testing alongside security, performance, and accessibility checks.
- 06
Release
Human + AIProduction deployment, UAT, knowledge transfer, runbooks. Cutover is documented, reversible, and on a schedule you approve. Your team takes the keys — or we operate it for you.
- 07
Evolve
Human + AILaunch is a milestone, not a finish line. Monitoring, feedback loops, and incremental improvements keep the system compounding — and feed the next discovery cycle.
Each release feeds the next discovery
Development Formats and Billing
Monthly Team Allocation
The best AI products require experimentation and iteration. With Monthly Team Allocation, you reserve a dedicated AI squad. You get:
- A senior team that’s always yours, never reassigned mid-project
- Scope and priorities you can flex sprint by sprint
- Predictable monthly spend with no padding for risks you may never use
- Velocity from a team that already knows your codebase
Agile
Agile software development involves a series of short sprints to ensure rapid, transparent progress toward your product goals. We apply this nimble, responsive approach to incorporate your feedback, adjust priorities as needed, and ensure your approval at every step. We use the Agile best practice because it is more flexible—and less risky—than the linear Waterfall development methodology.
How we engage
From a written, you-own-it plan to a production pilot to a scaled rollout — each step earns the next.
AI Agent Discovery
1–2 weeks. Map workflow, score buy-vs-build, pick the highest-ROI agent, deliver a written plan with cost and timeline. You own the deliverable.
Production Pilot
4–8 weeks. Build against your real systems, run on real data, ship to a controlled cohort. Integration, evals, audit logging, and rollout plan included.
Scale engagement
Monthly Team Allocation. Expand the agent across workflows, users, or business units with a dedicated senior AI team.
We offer 2 approaches
to developing your project
Project
development
Project development provides a fully dedicated team to bring your vision to life, ensuring seamless delivery and alignment with your goals.
Benefits of Working with Diffco
Senior teams, no junior bench
Senior engineers from day one. The engineer who scopes the work is the engineer who ships it.
Streamlined Development Process
Agile project management will keep you in the loop, providing useful feedback during every iteration of your project.
Transparent Billing
You will always know what to expect and never face any surprises in the billing department. Understand your charges, both what you’re paying for and why.
Clear Communication and Detailed Reporting
From the moment we first connect to the moment we deliver exactly what you need, you’ll have all the information you need to keep your finger on the pulse of your project.
Audit-ready from day one
Every action the agent takes is logged. Every decision is traceable. SOC 2-aligned engagement practices, HIPAA- and GDPR-aware delivery, full IP assignment.
Success stories of our clients
We set up AI-native development across RedTrack's ad-tracking platform
We built an AI moderator that runs automated user research interviews at scale
We're building Raivan — an AI-powered next-gen veterinary PMS for M3 VIA
We built VetLeo — an AI companion pet owners ask anything about their pet
We set up AI-native development across RedTrack's ad-tracking platform
We built an AI moderator that runs automated user research interviews at scale
Frequently Asked Questions
Frequently Asked Questions
How is this different from buying Sierra, Decagon, Cresta, or Cognigy?
Platforms win when your workflow is generic. Custom agents win when your workflow is your edge, integrations are deep, or your data can’t leave your perimeter. We help you decide in discovery — and we’ll tell you to buy the platform if that’s the right call.
Which AI models do you use?
Whichever fits the task. OpenAI, Anthropic, Azure OpenAI, AWS Bedrock, Gemini, Llama, Mistral, DeepSeek, Qwen, open-weight. We pick on cost, latency, and risk.
Do you handle regulated data — HIPAA, GDPR, financial?
Yes. We’ve shipped agents in healthcare, fintech/regtech, and European-data contexts. Compliance designed in from day one, not patched later.
Who owns the agent and the IP?
You do. Full IP assignment is standard — code, prompts, fine-tunes, integrations.
Show more answers
Let’s build something
great together.
Need other services?
AI Engineering & Development
Production-ready AI products, agents, and copilots — engineered, integrated, and scaled for your business.
AI-Driven Product Discovery
A 2-week sprint that answers “should we build this, and what would it cost to run?” — eval set, architecture, cost model, go/no-go.
AI Staff Augmentation
Senior AI/ML and full-stack engineers embedded directly into your team — AI-first by default, adopting your stack and culture.
Web Development
Modern websites and web apps engineered by senior teams — fast, responsive, and easy to manage, with AI baked in when you need it.
