pgvector vs Scrapfly
Comparing architecture, runtime limits, open-source licenses, and monthly costs for autonomous agent pipelines.
Detailed Specifications & Compatibility Matrix
Extracted directly from GitHub REST API & official developer documentation
| Technical Feature / Metric | pgvector | Scrapfly |
|---|---|---|
| Developer / Organization | Andrew Kane & PostgreSQL Community | Scrapfly SAS |
| Open-Source Engine | ✓ Open Source (Public) | ✕ Proprietary Cloud |
| GitHub Stars (Repo/SDK) | ★ 23,475 GitHub Stars | Proprietary / Closed Core |
| Core Repository Language | C | Cloud API |
| Supported SDK Clients | ||
| Self-Hosted Deployment | ✓ Supported | Hosted Only |
| Docker / Container Ready | ✓ Official Image | Managed |
| Model Context Protocol (MCP) | ✓ Native MCP | ✓ Native MCP |
| Billing Architecture | free | usage based |
| Developer Free Tier | ✓ Yes 100% Free (PostgreSQL license) | ✓ Yes 1,000 free API credits |
| Entry Paid Tier (Monthly) | Free / Custom | $30 USD / mo |
| Pricing & Cost Architecture | 100% Free and open-source under the PostgreSQL License. Pre-installed and available with zero license fees on Supabase, AWS RDS, Neon, Azure, and self-hosted Postgres. | Free trial provides 1,000 initial API credits. Discovery plan starts at $30/mo for 200,000 API credits (basic request = 1 credit; JS rendering + residential proxy = 5-25 credits). |
| Key Engineering Insight | Changed the vector landscape by demonstrating that 90% of RAG architectures do not need a standalone vector database; they can simply execute vector queries on their existing Postgres tables. | Uses custom-patched Chromium instances to mimic real residential JA3/TLS browser fingerprints, bypassing Cloudflare Turnstile and DataDome automatically. |
Strengths & Trade-Offs
Objective engineering evaluation of both platforms
pgvector Evaluation
Key Advantages
- ✓ Runs directly inside PostgreSQL: eliminates data synchronization pipelines, extra microservices, and network hops
- ✓ Full ACID compliance, transactional integrity, relational SQL joins, and row-level security on vector tables
- ✓ Supports exact flat search, approximate IVF-flat, and HNSW graph-based similarity indexes
Limitations & Trade-Offs
- ✕ HNSW index build times and memory usage on Postgres can be slower than specialized standalone C++/Rust engines
- ✕ Lacks out-of-the-box multimodal vectorization wrappers or automatic reranking pipelines found in dedicated vector DBs
Scrapfly Evaluation
Key Advantages
- ✓ Advanced Anti-Scraping Protection (ASP) with automated residential proxy rotation and CAPTCHA solving
- ✓ Direct markdown format extraction parameter (&format=markdown) built specifically for LLM ingestion
- ✓ Full JavaScript rendering engine supporting custom pre-scrape evaluate scripts and scroll triggers
Limitations & Trade-Offs
- ✕ Advanced proxy and headless browser features consume between 5 and 25 API credits per request
- ✕ Strictly cloud-hosted API; no on-premise Docker deployment option
Source Quotes
Direct excerpts from official documentation backing our extracted specifications
pgvector Documentation Proof
"Open source extension under the PostgreSQL License with zero license fees."
"Completely free on any self-hosted or cloud-managed PostgreSQL instance."
"Standard extension installable via apt, yum, or Dockerfile in any Postgres environment."
Scrapfly Documentation Proof
"Discovery plan starts at $30/mo with 200,000 API credits and unlimited concurrency."
"Free trial includes 1,000 credits to test all features and proxy networks."
"Fully managed cloud infrastructure; integrations available via SDKs and REST."
Frequently Asked Questions: pgvector vs Scrapfly
Architectural trade-offs and decision criteria
Is pgvector or Scrapfly cheaper for developers?
pgvector has a starting price of $0/mo (free), while Scrapfly starts at $30/mo (usage based). pgvector includes a free tier (100% Free (PostgreSQL license)). Scrapfly offers a free tier (1,000 free API credits).
Can I self-host pgvector and Scrapfly in my own infrastructure?
pgvector is self-hostable under the open source license. In comparison, Scrapfly is proprietary cloud infrastructure.
Do pgvector and Scrapfly support the Model Context Protocol (MCP)?
pgvector has native support for MCP servers. Scrapfly fully supports Model Context Protocol integrations.
Which programming languages have official SDKs for pgvector vs Scrapfly?
pgvector provides official SDKs in: sql, python, typescript, rust, go. Meanwhile, Scrapfly supports: python, typescript, go, curl.