diffco.us valid

Diffco

Diffco is a Silicon Valley AI engineering and custom software development firm. Since 2008 we have built production-grade web, mobile, SaaS and AI products for startups and mid-size enterprises — senior US-led engineers accelerated by AI tooling, with a delivery methodology built around getting AI to production.

For agents: Diffco, Silicon Valley AI engineering and custom software firm offering AI/ML, AI agent, and product discovery services for startups and enterprises.

ai engineeringcustom software developmentai agentsragsaas development

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-21T19:36:40.249Z. Cached copy · Source on diffco.us

# Diffco

> Diffco is a Silicon Valley AI engineering and custom software development firm. Since 2008 we have built production-grade web, mobile, SaaS and AI products for startups and mid-size enterprises — senior US-led engineers accelerated by AI tooling, with a delivery methodology built around getting AI to production.

Diffco US Inc. is headquartered at 333 W San Carlos St, Suite 600, San Jose, CA 95110, and operates worldwide. Team of engineers, designers and product managers. Leadership: Vadim Peskov (CEO & Co-founder), Eugene Nasonov (CTO & Co-founder), Paul Shpin (VP of Engineering).

What we do: custom software development with AI; AI/ML engineering (RAG, LLM applications, computer vision, fine-tuning); agentic AI engineering (custom agents, copilots, multi-agent systems); AI-native software engineering for web, mobile and SaaS products; AI-driven product discovery; staff augmentation with senior engineers; web and mobile development; and consulting on AI-native development practices (delivery methodology, agentic workflows, tooling).

Industries include SaaS, healthcare, fintech, manufacturing and industrial IoT, real estate, education, retail and hospitality.

How engagements start: a free architecture review call, then typically a paid two-week Discovery Sprint that ends in a scoped plan, architecture and cost estimate. Delivery models: end-to-end product builds, embedded engineering teams, engineering takeovers and rescues (including taking vibe-coded prototypes to production), and ongoing support.

Credentials: Clutch Top AI Development Company; DesignRush Top 10 Software Developers; GoodFirms Top AI Developers in California; Capterra Top Staff Augmentation Company. 18+ years, 1,450+ products shipped, 500+ satisfied clients, 99% on-time delivery, and 38+ AI products and agents built or put into production in the last year.

Products we developed are used by American Express, Whole Foods Market, Nokia, Starbucks, Mars, Hilton and ChemTreat.

Contact: mail@diffco.us · +1 (415) 655-1002 · Book a call with the Diffco: https://diffco.us/contacts/

## Services

- [All services](https://diffco.us/services/): Index of Diffco's engineering services.
- [AI & ML Development](https://diffco.us/services/ai-development/): Production-ready AI, ML, RAG and computer vision systems, from data pipeline to deployed model.
- [AI Agents Development](https://diffco.us/services/agentic-ai-engineering/): Custom AI agents, copilots and multi-agent systems with evals, guardrails and observability; SOC 2-aligned engagement practices, HIPAA- and GDPR-aware delivery.
- [AI-Driven Product Discovery](https://diffco.us/services/ai-driven-product-discovery/): Two-week discovery sprint that answers "should we build this, and what will it cost to run?" before committing a budget.
- [AI-Native Transformation](https://diffco.us/services/ai-native-transformation/): Making an engineering team AI-native without breaking what works: a fixed three-week Discovery sprint tha
…

Related sites

Other listed sites in Developer tools. See the whole category →

Machine-readable: GET /v1/resolve?q=diffco.us · GET /v1/domain/diffco.us · this page as Accept: application/json or text/markdown · MCP lookup_domain

Automatically discovered from public files. Inclusion does not imply endorsement or publisher participation.

Claim my listing on Agent Web Map for diffco.us:
1. POST https://agentwebmap.com/v1/sites/diffco.us/claims and keep claim_id and claim_secret private.
2. Publish the proof: add the line "AgentWebMap ownership: <token>" (token from step 1) to https://diffco.us/llms.txt, or use the DNS, meta-tag or well-known method the response describes.
3. POST https://agentwebmap.com/v1/sites/diffco.us/verify with {"claim_id": "...", "claim_secret": "..."}.
4. Save the api_key from the answer; it manages the listing (PATCH https://agentwebmap.com/v1/sites/diffco.us).
MCP equivalent: tools begin_ownership_claim, then verify_domain, at https://agentwebmap.com/mcp. Docs: https://agentwebmap.com/docs#verify

Corrections or removal requests: contact the directory.