WhichToUse

Best Research & Search AI tools

Apps and open-source skills for research & search that we opened, read up on, and ranked — with the reasoning behind every pick.

APP / SAAS7
1O
OpenAI Deep Research
HighPaid (Plus/Pro ~$20-200/mo)
9.4
2P
Perplexity (Deep Research)
HighFreemium (Pro ~$20/mo)
9.1
3C
Claude Research
HighFreemium (Pro ~$20/mo)
8.8
4G
Gemini Deep Research
HighFreemium (free tier available)
8.5
5E
Elicit
HighFreemium (~$12/mo)
8.2
6C
Consensus
MediumFreemium (~$9/mo)
7.3
7N
NotebookLM
MediumFree
7.0
SKILL / REPO6
1L
last30days
HighFree / OSS
9.4
2I
imbad0202/academic-research-skills
HighFree / OSS
9.1
3G
GPT Researcher
HighFree / OSS
8.8
4S
STORM (Stanford OVAL)
HighFree / OSS
8.5
5C
claude-deep-research-skill
MediumFree / OSS
7.3
6L
lingzhi227/agent-research-skills
LowFree / OSS
5.4