Custom AI apps · data updated 2026-10-21
Hire a developer for an AI assistant that answers from your documents
We list 222 agencies that fit this, each checked against its own website. Of the 28 that publish a project price, the median is $4,250 and the middle half sits between $1,950 and $15,000. These assistants answer questions from your own documents and data and show where each answer came from. Developers call this RAG.
| Agencies in this list | 222 |
|---|---|
| Publish a starting price | 28 |
| Median published price | $4,250 |
| Typical range (25th–75th pct) | $1,950–$15,000 |
| Top countries | United States, India, United Kingdom, Australia, France |
Prices are starting prices agencies publish on their own sites, converted to USD; n = agencies with a price. Method.
Get matched with 3 vetted agencies Or browse matches yourself
What a good RAG build includes
A documented chunking and retrieval approach, re-ranking, citations in answers, an evaluation set to measure answer accuracy, and access controls so people only retrieve what they are allowed to see.
Top 30 of 222 by Cofounderbase Score
| # | Agency | Location | Builds with | Services they list | Score | Save |
|---|---|---|---|---|---|---|
| 1 |  Makeitfuture Partner | Cluj-Napoca, Romania | n8n, Make, Zapier | Automation solutions · AI WhatsApp order automation | 91 | |
| 2 | Softweb Solutions | United States | Power Automate, UiPath, LangChain | Agentic AI · AI consulting | 79 | |
| 3 |  Samcom Technologies | India | n8n, Zapier, Retell AI | AI Voice Agent Development · VoIP Development & Support | 77 | |
| 4 |  flowio | Glasgow, United Kingdom | n8n, Zapier, Airtable | Workflow Automation Services · AI Voice Agent Development | 77 | |
| 5 |  ChatGPT.ca | Markham, Canada | Make, Zapier, OpenAI | AI Agents & Automation · AI Customer Support Chatbot | 74 | |
| 6 |  THE TISA | India | n8n, LangChain, OpenAI | AI Agent Development · Generative AI Development | 74 | |
| 7 |  SynkrAI | Ahmedabad, India | n8n, Zapier, LangChain | AI Agent Development Company · AI Automation Consulting | 73 | |
| 8 |  SoluLab - Blockchain & AI Development Company | India | n8n, Zapier, LangChain | Blockchain development · Generative AI development | 72 | |
| 9 |  Arcesso | Not stated | n8n, Vapi, OpenAI | AI agent development · AI automation agency | 72 | |
| 10 |  Crux Digits | Nieuwegein, Netherlands | LangChain, OpenAI, Claude | AI Audit & Strategy · AI Implementation | 72 | |
| 11 |  Amplence | Sheridan, United States | n8n, Make, Zapier | Workflow Automation · Business Process Automation | 71 | |
| 12 |  Teamvoy | Lviv, Ukraine | n8n, LangChain, OpenAI | Strategy · AI & System Readiness Audit | 71 | |
| 13 |  Width.ai Partner | Not stated | n8n, LangChain, OpenAI | n8n | 71 | |
| 14 |  Apptunix | Sahibzada Ajit Singh Nagar, United Kingdom | LangChain, OpenAI, Claude | Data Analytics · Software Development | 71 | |
| 15 |  JPLoft | Denver, United States | OpenAI, Claude, Salesforce | AI & Automation · Agentic AI | 71 | |
| 16 |  Akveo | United States | n8n, Make, Zapier | AI Strategy · Agentic AI | 71 | |
| 17 |  EdgeFirm | United Kingdom | LangChain, OpenAI, Salesforce | Support queries handled · Less time on reporting | 69 | |
| 18 |  PxlPeak | Olive Branch, United States | n8n, Make, Zapier | AI Speed-to-Lead · AI Chatbots & Voice Agents | 68 | |
| 19 | SolGuruz | Ahmedabad, India | n8n, Voiceflow, Vapi | AI-Assisted Custom Software Development Company · Custom Software Development Portfolio | 68 | |
| 20 |  AY Automate | Casper, United States | n8n, Zapier, OpenAI | DEPLOY AUTOMATION · Automate Repetitive Tasks | 68 | |
| 21 |  Agenix AI Partner | United Kingdom | n8n, OpenAI, HubSpot | Scope the workflow · Launch with support | 68 | |
| 22 |  Intuz | San Francisco, United States | n8n, OpenAI, LangGraph | Agentic AI Systems · Cloud & DevOps | 68 | |
| 23 | Appinventiv | New York, United States | LangChain, OpenAI, Claude | Strategic Technology Consulting · Digital Product Development & Engineering | 68 | |
| 24 |  Ahex Technologies | L'viv, India | LangChain, OpenAI, Claude | AI development services · ERP Consulting and Development | 68 | |
| 25 |  AiAdvisors Partner | Warsaw, Poland | n8n, Claude | Agentic process automation · Document intelligence & RAG | 67 | |
| 26 |  Catalytics Automation Partner | Miami, United States | Zapier, Airtable, OpenAI | 01 Operations Consulting · 03 AI Automations | 67 | |
| 27 |  Softomate Solutions | London, United Kingdom | Power Automate, GoHighLevel, OpenAI | Business Process Automation · Customer Support Automation using AI | 67 | |
| 28 |  ITECS.AI | Dallas, United States | Make, Zapier, Power Automate | Personal agents on every desktop · Enterprise agents in your systems | 66 | |
| 29 |  Azilen Technologies | United States | Zapier, LangChain, OpenAI | Enterprise AI Development Company · Custom Agentic AI Development | 66 | |
| 30 |  Kizzy Consulting | Not stated | Zapier, OpenAI, Claude | AI Agents Development For Enterprise · AI Readiness Agent | 66 |
Questions
How much does it cost?
Published starting prices from these 28 agencies: median $4,250, 25th–75th percentile $1,950–$15,000 (USD, as listed on their sites on 2026-10-21).
How do I pick one?
Ask for two case studies close to your project, who will actually build it, how they test (evals for AI work), and who owns the code and accounts at the end. Our free brief form below sends your project to three fitting agencies.
Where does this data come from?
From each agency's own website, re-checked on a schedule (last update 2026-10-21). Rankings use the published Cofounderbase Score and are not sold.
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Get matched with 3 vetted agencies
Describe the project. We read every brief and introduce you to three agencies from this index that fit it, usually within 2 working days. Free for buyers; agencies can't pay to be picked.