semble
★ 4.6k
vs
contrastapi
★ 28
semble vs contrastapi
semble: Semble is a high-performance code search library designed for AI agents, providing instant access to precise code snippets. It offers significantly faster indexing and querying compared to transformer models, achieving 99% of their retrieval quality while running entirely on CPU without external dependencies.; contrastapi: ContrastAPI is a security intelligence API and MCP server that offers over 35 endpoints covering CVE lookup, domain reconnaissance, IP reputation, threat intelligence, code security scanning, and more. It is free to use with a rate limit of 100 requests per hour and requires no API key for the free tier. The tool is designed for AI agents and integrates seamlessly with platforms like Claude Desktop, Cursor, VS Code, and Windsurf.
01
TL;DR
Choose semble if…Enhancing AI agents (e.g., Claude Code, Cursor, Codex) with fast and accurate code search capabilities
Choose contrastapi if…Perform a comprehensive security audit on a domain, including DNS, SSL, and threat intelligence
02
Side-by-Side Comparison
03
Features
semble01Fast performance on CPU (indexes in ~250ms, queries in ~1.5ms)
02High accuracy (NDCG@10 of 0.854), comparable to transformer models
03Supports indexing local paths and remote Git repositories
04Functions as an MCP server for various AI agents
05Zero setup, no API keys, GPU, or external services required
contrastapi01One-call full domain report combining DNS, WHOIS, SSL, subdomains, WAF, and IP reputation
02CVE intelligence enriched with EPSS exploit probability and CISA KEV status
03IP reputation via AbuseIPDB and Shodan with 24-hour cache
04Technology fingerprinting for CMS, frameworks, CDN, and analytics
05Free forever with 100 req/hr, no API key required
04
Use Cases
semble↳Enhancing AI agents (e.g., Claude Code, Cursor, Codex) with fast and accurate code search capabilities
↳Searching local or remote codebases for specific code snippets based on natural language or code queries
↳Finding semantically similar code sections related to a given file path and line number
contrastapi↳Perform a comprehensive security audit on a domain, including DNS, SSL, and threat intelligence
↳Look up CVE details and check if they are actively exploited in the wild
↳Check the reputation of an IP address and enrich it with malware data
05
Best For
sembleCode AssistantRAG / Knowledge Base
contrastapiTrendingSecurity & SafetyAPI Integration
FAQ
FAQ
What is the difference between semble and contrastapi?
Both semble and contrastapi are in the RAG / Knowledge Base category. semble has 4.6k stars, while contrastapi has 28 stars.
Which is better, semble or contrastapi?
The best choice depends on your use case. Choose semble if Enhancing AI agents (e.g., Claude Code, Cursor, Codex) with fast and accurate code search capabilities, and contrastapi if Perform a comprehensive security audit on a domain, including DNS, SSL, and threat intelligence.
Is semble free or open source?
Yes, semble is open source on GitHub (MIT).
Is contrastapi free or open source?
Yes, contrastapi is open source on GitHub (MIT).
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