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🏆 Top 10 GPT & LLM Integration Agencies

Ranked by rating, verified review count, and track record. Updated for 2026.

# Agency Rating Team Size
1 InferenceDev 4.9 ★ 51–200 people View
2 EmbedTech 4.9 ★ 2–10 people View
3 EmbedDev 4.7 ★ 51–200 people View
4 GenTech 4.7 ★ 2–10 people View
5 PromptDev 4.4 ★ 200+ people View
6 TokenDev 4.3 ★ 2–10 people View
7 VectorTech 4.2 ★ 200+ people View
8 LangTech 4.1 ★ 200+ people View
9 InferenceTech 4.1 ★ 2–10 people View
10 ModelTech 4.1 ★ 200+ people View
1
I

InferenceDev ✓ Verified

4.9 (42 reviews)

Helping product teams integrate generative AI capabilities quickly, safely, and cost-effectively.

📍 Dunedin, NZ 👥 51–200 people 💰 From $5k
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2
E

EmbedTech

4.9 (40 reviews)

AI-powered chatbot, copilot, and document Q&A solutions built on leading language models.

📍 Rzeszow, PL 👥 2–10 people 💰 From $50k
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3
E

EmbedDev ✓ Verified

4.7 (27 reviews)

GPT and LLM integration agency embedding ChatGPT, Claude, and Gemini into your products.

📍 Zurich, CH 👥 51–200 people 💰 From $25k
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4
G

GenTech ✓ Verified

4.7 (3 reviews)

LLM evaluation, safety, and reliability engineering for production AI product deployments.

📍 Querétaro, MX 👥 2–10 people 💰 From $25k
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5
P

PromptDev ✓ Verified

4.4 (41 reviews)

Helping product teams integrate generative AI capabilities quickly, safely, and cost-effectively.

📍 Mechelen, BE 👥 200+ people 💰 From $5k
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6
T

TokenDev ✓ Verified

4.3 (26 reviews)

GPT and LLM integration agency embedding ChatGPT, Claude, and Gemini into your products.

📍 Porto, PT 👥 2–10 people 💰 From $20k
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7
V

VectorTech

4.2 (43 reviews)

Custom LLM fine-tuning, RAG architecture, and AI agent development for enterprise applications.

📍 Montreal, CA 👥 200+ people 💰 From $20k
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8
L

LangTech ✓ Verified

4.1 (10 reviews)

LLM evaluation, safety, and reliability engineering for production AI product deployments.

📍 Monterrey, MX 👥 200+ people 💰 From $5k
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9
I

InferenceTech

4.1 (32 reviews)

Prompt engineering, vector database setup, and production LLM deployment consultancy.

📍 Yokohama, JP 👥 2–10 people 💰 From $15k
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10
M

ModelTech

4.1 (10 reviews)

Custom LLM fine-tuning, RAG architecture, and AI agent development for enterprise applications.

📍 Dundalk, IE 👥 200+ people 💰 From $50k
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