DeepYardDeepYard

Best AI Developer Tools in 2026

64 ai developer tools ranked by community signals — GitHub stars, contributor count, commit activity, and trending status. Updated May 2026.

1

Crawl4AI

Open-source web crawler optimized for LLMs and AI agents — 62K+ stars

OSS66.1K stars
66.1K1w ago72
2

Firecrawl

Web scraping API built for LLMs — turn any website into LLM-ready data — 89K+ stars

OSS122.9K stars
122.9Ktoday145
3

Headroom Context Optimization

Reduce LLM API costs by 50-90% through advanced context compression

OSS111.4K stars
111.4Ktoday78

All AI Developer Tools by Ranking

4
L

LlamaIndex

Data framework for LLM applications — RAG, agents, and workflows — 47K+ stars

OSSFree
LlamaIndex
49.6K2d ago473
5
M

Mem0

Persistent, adaptive memory layer for AI agents and assistants

OSSfreemium
Mem0
56.4Ktoday310
6
n

n8n

Fair-code workflow automation platform with native AI and 400+ integrations — 178K+ stars

Source Avail.freemium
n8n
189.2Ktoday429
7
R

RAG Failure Diagnostics Clinic

Diagnose and fix common RAG pipeline failure modes

OSSFree
Shubham Saboo
111.4Ktoday78
8
T

Toonify Token Optimization

Reduce LLM API costs by 30-60% through intelligent token compression

OSSFree
Shubham Saboo
111.4Ktoday78
9
C

Chroma

The open-source AI-native vector database — 27K+ stars

OSSfreemium
Chroma
28.0Ktoday183
10
L

Langfuse

Open-source LLM engineering platform — traces, evals, prompt management — 23K+ stars

OSSfreemium
Langfuse
27.7Ktoday155
11
A

Activepieces

Open-source Zapier alternative with 280+ integrations and the largest MCP collection — 21K+ stars

OSSfreemium
Activepieces
22.3Ktoday353
12
p

promptfoo

Test and evaluate LLM prompts and agents — 11K+ stars

OSSFree
promptfoo
21.5Ktoday283
13
C

CUA

Open-source infrastructure for Computer-Use Agents with sandboxes and benchmarks — 13K+ stars

OSSFree
trycua
17.0Ktoday60
14
A

Arize Phoenix

Open-source LLM observability with tracing, evaluation, and datasets — 8K+ stars

OSSfreemium
Arize AI
9.8K250.0K/wtoday173
15
E

E2B

Secure cloud sandboxes for AI-generated code execution — 11K+ stars

OSSfreemium
E2B
12.3Ktoday48
16
P

Portkey

AI gateway with guardrails, caching, and observability for 200+ LLMs — 11K+ stars

OSSfreemium
Portkey
11.8K3d ago101
17
H

Helicone

Open-source LLM observability proxy with one-line integration

OSSfreemium
Helicone
5.7K4d ago97
18
Z

Zep

Long-term memory and knowledge graph store for AI assistants and agents

OSSfreemium
Getzep
4.6K6w ago15
19
O

Open Terminal

A computer you can curl — cloud terminal sandbox by Open WebUI — 800+ stars

OSSFree
Open WebUI
2.6K5w ago3
20
B

Braintrust

AI evaluation and experiment tracking platform for production LLM apps

Commercialfreemium
Braintrust
1.2K6d ago87
21
L

LangSmith

Observability, tracing, and evaluation platform for LLM applications

Commercialfreemium
LangChain
895today84
22
A

AegisUI

Semantic security layer detecting malicious UI behaviors in AI agent systems beyond schema validation

OSSFree
Research Team (Uddin & Hajira)
23
A

Agent Audit

Security analysis system for LLM agent applications and MCP configurations

OSSFree
Research Project
24
A

AgentDS

Benchmark framework measuring AI agent performance vs human experts on data science tasks

unknownFree
Research Team
25
a

ai-agents-for-beginners

Microsoft's free 12-lesson curriculum for learning to build AI agents from scratch

OSSFree
Microsoft
26
A

Agent Identity Protocol (AIP)

Cryptographic identity protocol for verifiable agent delegation and provenance tracking

OSSFree
Independent Research
27
A

Agent Lifecycle Toolkit (ALTK)

Standardized middleware for production-ready AI agents with built-in failure handling

OSSFree
Multiple Authors
28
a

awesome-claude-code

Curated directory of Claude Code extensions, skills, and orchestration tools

OSSFree
hesreallyhim
29
c

claude-code-best-practice

Production-ready best practices guide for Claude Code and agentic engineering workflows

OSSFree
Shan Raisshan
30
C

ClawTrap

MITM red-teaming framework for testing autonomous web agent security in real-world scenarios

OSSFree
Independent Researchers
31
C

Cognitive Firewall

Hybrid edge-cloud security defense against prompt injection attacks on browser AI agents

OSSFree
Research Team
32
C

Context7

Real-time documentation sync for AI code editors via MCP servers

OSSFree
Upstash
33
C

CUA-Suite

Large-scale human-annotated video dataset for training computer-use agents

OSSFree
Research Team
34
E

ElephantBroker

Knowledge-grounded cognitive runtime for trustworthy AI agents with verifiable memory

OSSFree
Cognee
35
E

EVMbench

Benchmark for evaluating AI agents on smart contract security tasks

OSSFree
Research Team (Wang et al.)
36
F

FinToolBench

Specialized benchmark for evaluating LLM agents on real-world financial tool use and compliance

OSSFree
Research Collaboration
37
f

flexvec

SQL-based vector retrieval with runtime embedding manipulation for AI agents

OSSFree
Research Project
38
H

HippoCore

Drop-in persistent memory layer for AI agents with vector embeddings and MCP support

OSSFree
HippoCore
39
H

HippoCore

Drop-in persistent memory layer for AI agents with native MCP support

OSSFree
HippoCore
40
H

HippoCore

Drop-in persistent memory layer for AI agents with vector embeddings and MCP support

OSSFree
HippoCore Team
41
J

JetBrains AI Toolkit

In-IDE LLM tracing and evaluation for JetBrains developers

Commercialpaid
JetBrains
42
L

LH-Bench

Evaluation framework for measuring long-horizon agent workflows on enterprise tasks

OSSFree
Research Project
43
M

MCP-in-SoS

Security risk assessment framework for evaluating open-source MCP server implementations

OSSFree
Research
44
m

mcp-sec-audit

Security auditing toolkit for MCP servers with static analysis and sandboxed testing

OSSFree
Charoes Huang
45
M

MemMA

Multi-agent memory framework with self-evolution for LLM agents

OSSFree
Independent Researchers
46
P

PAVE

Memory-efficient AI agent framework optimized for terminal and iOS environments

OSSFree
cnrai
47
P

PostTrainBench

Benchmark for evaluating autonomous post-training of LLMs under compute constraints

OSSFree
Research Collaboration
48
P

Pyrimid

Marketplace for paid MCP/API products with x402-style payments on Base USDC for AI agent commerce

Commercialfreemium
Pyrimid
49
R

RuView

WiFi-based spatial intelligence: presence detection and vital signs monitoring using ESP32

OSSFree
ruvnet
50
R

RuView

WiFi-based human pose estimation and vital sign monitoring using commodity hardware

OSSFree
ruvnet
51
S

Scrapling

Adaptive web scraping framework with MCP integration and stealth capabilities

OSSFree
D4Vinci
52
S

SlopCodeBench

Benchmark for measuring coding agent performance degradation across iterative tasks

OSSFree
Research Collaboration
53
S

SpecOps

Automated testing framework for GUI-based AI agents in real-world environments

OSSFree
Research
54
T

TA-Mem

Tool-augmented memory system enabling dynamic retrieval for long-term conversational AI

OSSFree
Research (Mengwei Yuan et al.)
55
T

TDAD

Pre-change impact analysis for AI coding agents using graph-based dependency mapping

OSSFree
Research Project
56
T

TML-Bench

Benchmark for evaluating data science agents on Kaggle-style tabular ML tasks

OSSFree
Independent
57
T

TopoChunker

Topology-aware document chunking that preserves hierarchical structure for better RAG retrieval

OSSFree
Independent Researcher
58
T

TrendRadar

AI-powered trend monitoring platform with multi-platform aggregation and smart alerts

OSSFree
sansan0
59
T

TrendRadar

AI-powered trend monitoring with multi-platform aggregation and natural language analysis via MCP

OSSFree
sansan0
60
V

Veritas

LLM-powered binary analysis for detecting memory corruption vulnerabilities in stripped code

OSSFree
Columbia University / King's College London
61
Z

ZEBRAARENA

Diagnostic simulation environment for testing LLM reasoning and tool use capabilities

OSSFree
Research Project
62
Z

Zeta 2.1

Edit prediction model that suggests your next code change before you make it

OSSFree
Zed Industries
63
Z

Zeta-2

Real-time edit prediction model for AI-powered code editors

OSSFree
Zed Industries
64
z

zeta

AI edit prediction model that anticipates next code changes for faster assistant workflows

OSSFree
Zed Industries
Browse all Dev Tools with filters