Compare serpx and Langflow on pricing, features, platforms, and ratings — both AI tools, Freemium, credit-based SaaS pricing: Free $0/mo (10 credits), Pro…
At a Glance
serpx
Langflow
Primary category
AI
AI
Rating
Not documented
Not documented
Pricing model
Freemium, credit-based SaaS pricing: Free $0/mo (10 credits), Pro $39/mo or $32/mo billed annually ($384/yr, 600 credits), and Business $99/mo or $82/mo billed annually ($984/yr, 4,000 credits); accepts credit card, PayPal, and cryptocurrency.
Open Source
Starting price
$9.75
Free (self-hosted, MIT license); Langflow Cloud from about $25/month
Free plan
Yes
Yes
Free trial
Not documented
Not documented
Platforms
Not documented
Web
Team collaboration
Not documented
Not documented
AI features
Yes
Yes
Public API
Yes
Yes
Pricing Compared
Starting price reflects the lowest paid tier, not the full cost for every team size or usage level.
serpx
No individual plan breakdown documented yet.
Langflow
Open Source (Self-Hosted) — Free Free (MIT license)
Langflow Cloud Free Tier — Free Free
Langflow Cloud Paid — From about $25/month Monthly
Combines AI site audits, competitor keyword gap analysis, and technical SEO fixes in one credit-based platform instead of several separate tools
Free official WordPress plugin brings AI SEO workflows and keyword research directly into the WP dashboard
REST API (Websites, Reports, Account endpoints) enables programmatic reporting for agencies and developers on paid plans
Free tier lets users test AI SEO Audits and keyword reports before committing to a paid plan
Cons
Usage is credit-based, so heavy AI content generation or frequent audits can exhaust monthly credits quickly on lower-tier plans
Free plan is capped at one website and three reports per month, limiting real-world evaluation for multi-site users
API access and priority support are reserved for the Business plan, not included on Free or Pro
Public marketing pages disclose limited detail about the company itself (team, founding date, location)
Langflow
Pros
Fully open source and free under the MIT license, with no forced paid tier for core functionality
Visual canvas makes RAG and agent prototyping accessible to non-expert developers
Ability to export to raw Python code bridges the gap between prototyping and production
Large and fast-growing GitHub community with over 150,000 stars
Backed by IBM's resources following the DataStax acquisition, aiding long-term maintenance
Cons
Real-world costs still come from LLM API usage, vector databases, and infrastructure, which are not included in the free software
Self-hosted deployments require managing servers, scaling, and monitoring without a managed cloud plan
Visual flows can become difficult to manage for very complex, large-scale agent architectures
Ownership changes (Logspace to DataStax to IBM) may raise questions about long-term product direction for some adopters
Langflow Cloud does not publish a detailed public pricing page beyond a reported starting price
Use Cases
serpx
Langflow
Rapid RAG chatbot prototyping — Developers visually assemble retrieval-augmented generation pipelines to quickly prototype chatbots grounded in custom data.
Multi-agent workflow design — Teams build coordinated multi-agent systems where specialized agents handle different parts of a complex task.
Low-code to production handoff — Organizations prototype AI workflows visually, then export the generated Python code for hardening into a production application.