The Index of AI Opens Q4 2026

All tools in the index.

The full set, grouped by category. Every entry is checked by a person; a ✓ marks a price confirmed against the vendor's official page this cycle. The rest are being verified in waves.

50 Tools · 33 price-verified
As of 2026-08-15

Dev tooling

14
CursorAI-native code editor, multi-model
$20/mo
Proprietary
✓
GitHub CopilotInline autocomplete + agent mode
$10/mo
Proprietary
✓
Claude CodeAgentic CLI coding, Claude-only
$20+/mo
Proprietary
✓
WindsurfAgentic IDE, now under Cognition
Under review
Proprietary
·
ClineOpen-source agent, bring your own key
Free
Apache-2.0
✓
AiderTerminal pair-programmer, git-native
Free
Apache-2.0
✓
Replit AgentBrowser IDE that builds and deploys
$20/mo
Proprietary
·
Amazon Q DeveloperAWS coding assistant + agents
Free
Proprietary
·
ContinueOpen-source IDE assistant, any model
Free
Apache-2.0
✓
Gemini Code AssistGoogle's IDE + CLI assistant
Free
Proprietary
·
TabninePrivacy-first completion, self-hostable
$9/mo
Proprietary
·
Sourcegraph CodyCodebase-aware assistant + search
$9/mo
Apache-2.0
·
ZedFast native editor with AI built in
Free
GPL-3.0
✓
JetBrains AI AssistantAI across the JetBrains IDEs
$10/mo
Proprietary
·

Agent frameworks

12
LangChainThe model-app framework, batteries in
Free
MIT
✓
LangGraphStateful multi-agent orchestration
Free
MIT
✓
CrewAIRole-based multi-agent crews
Free
MIT
✓
LlamaIndexRAG-grounded agent workflows
Free
MIT
✓
OpenAI Agents SDKLightweight agents + handoffs
Free
MIT
✓
AutoGenConversation-driven agent teams
Free
MIT
✓
Semantic KernelMicrosoft's enterprise agent SDK
Free
MIT
✓
Pydantic AIType-safe agents from the Pydantic team
Free
MIT
✓
DSPyProgram, don't prompt — Stanford
Free
MIT
✓
HaystackProduction RAG + agents by deepset
Free
Apache-2.0
✓
Google ADKAgent Development Kit for Gemini
Free
Apache-2.0
✓
smolagentsMinimal code-writing agents, HF
Free
Apache-2.0
✓

Evals

11
LangSmithTracing + eval workflows
$39/seat
Proprietary
✓
LangfuseOpen-source tracing + evals
$29/mo
MIT
✓
PromptfooCI-gated eval + red-teaming (OpenAI)
Free
MIT
✓
BraintrustThe production quality loop, flat rate
$249/mo
Proprietary
✓
W&B WeaveTracing + evals from Weights & Biases
Free
Apache-2.0
·
RagasThe core RAG metrics library
Free
Apache-2.0
✓
HeliconeOne-line LLM observability proxy
Free
Apache-2.0
·
Arize PhoenixOpen-source tracing + eval
Free
Elastic-2.0
✓
DeepEvalPytest-style LLM unit tests
Free
Apache-2.0
✓
GalileoEnterprise eval + guardrails
$100/mo
Proprietary
·
Comet OpikOpen-source eval + tracing by Comet
Free
Apache-2.0
·

Infrastructure

13
PineconeManaged serverless vector store
$20+/mo
Proprietary
✓
pgvectorVector search inside Postgres
Free
PostgreSQL
✓
RedisIn-memory store with vector search
Free
RSALv2
·
GroqUltra-low-latency inference (LPU)
Usage
Proprietary
·
QdrantRust-native vector DB, easy self-host
Free
Apache-2.0
✓
MilvusScalable open-source vector DB
Free
Apache-2.0
✓
WeaviateHybrid search vector DB
$45+/mo
BSD-3-Clause
✓
MongoDB Atlas VectorVector search in Atlas
Free
SSPL
·
ChromaDeveloper-first embedding database
Free
Apache-2.0
✓
Together AIOpen-model inference + fine-tuning
Usage
Proprietary
·
Fireworks AIFast open-model inference API
Usage
Proprietary
·
LanceDBEmbedded vector DB on Lance
Free
Apache-2.0
✓
turbopufferVector + full-text on object storage
Usage
Proprietary
·

Ordered by adoption within each category. Pricing is the entry paid tier, or Free for open source, from each vendor's public pages — verify before you buy.