Zep
Apps
Fast, scalable building blocks for LLM apps
Like Portkey, Zep is in the Apps category. Both are freemium. Worth comparing on the detail page.
We've curated 50 of the best alternatives to Portkey, ranked by feature overlap, topic similarity, user ratings, and popularity. Zep, FlowiseAI, and Sieve lead the list as the closest matches.
Updated May 18, 2026
The list includes 50 freemium, so whether you're looking for a no-cost replacement or a more capable paid tier, there's an option to compare. Portkey itself is freemium, which makes freemium alternatives the most natural starting point.
Many of these tools cluster around use cases like Api, App Development, Natural Language Processing, and Ai Integration — the same problem spaces Portkey addresses. Cross-referencing tools that overlap on multiple topics gives a more reliable signal than category alone, because two products in the same category can still serve very different workflows.
Our ranking weighs eight signals: shared category, topic overlap, feature overlap, name and description text similarity (via PostgreSQL's pg_trgm and tsvector), Bayesian-smoothed user ratings, pricing-model match, popularity, and editorial overrides. Scores are then normalized within each tool's own candidate pool so the top match always represents the strongest available alternative.
Use the table of contents below to jump to free or paid alternatives, or scroll down to compare each option side-by-side with Portkey.
Ranked by compatibility score
Apps
Fast, scalable building blocks for LLM apps
Like Portkey, Zep is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Build LLM apps visually with open-source tools
Like Portkey, FlowiseAI is in the Apps category. Both are freemium. Worth comparing on the detail page.
0 free and 50 freemium options.
26 additional candidates
Zep ranks as the highest-scoring alternative to Portkey, based on shared category, topic overlap, feature similarity, and user ratings. Ratings are still being collected for this tool.
Yes — 0 fully free and 50 freemium alternatives are available, including Zep, FlowiseAI, and Sieve.
Zep is similarly priced (freemium) and sits in the same category (Apps). View its detail page to compare features, integrations, and reviews side-by-side.
Top Apps alternatives include Zep, FlowiseAI, Sieve, and FlutterFlow AI Gen. These tools share the same primary category and have meaningful topic overlap with Portkey.
Neither Portkey nor Zep has user ratings yet — be the first to review either tool to help future visitors compare them.
Apps
Empower teams to build AI-powered video and audio apps faster.
Like Portkey, Sieve is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Generate stunning app designs with code in one click.
Like Portkey, FlutterFlow AI Gen is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
AI-powered backend platform for faster app development
Like Portkey, Singlebase is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Deploy apps instantly from a single prompt.
Like Portkey, Shuttle is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Simple web APIs for private LLMs.
Like Portkey, Gradient.AI is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Set new standards in AI-native app development.
Like Portkey, TaskingAI is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Build your app in 5 minutes, no coding required.
Like Portkey, Sutro is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Connect AI models visually, deploy instantly.
Like Portkey, TakomoAI is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Prototype and deploy generative AI apps for engineers.
Like Portkey, LastMile is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Build AI tools without code in seconds.
Like Portkey, FormWise is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Add natural language capabilities to your apps easily.
Like Portkey, Chariotai is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Build AI apps that transform data into knowledge.
Like Portkey, Graphlit is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Just chat to make an app
Like Portkey, AppAsap is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Build AI Powered Apps for superior efficiency.
Like Portkey, Promptmate is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Turn conversation into deployed software.
Like Portkey, EngineLab is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Build predictive models on the modern data stack.
Like Portkey, Continual is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Build computer vision apps without code
Like Portkey, Datature is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Accelerate AI app development 10x with no-code/low-code
Like Portkey, Instill Tech is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Empower AI teams to build, train, and automate.
Like Portkey, Labelbox is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Unite AI, NoCode, and Code to build SaaS tools fast
Like Portkey, MarsX is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Transform ideas into AI apps in minutes
Like Portkey, UBOS is in the Apps category. Both are freemium. Worth comparing on the detail page.
Apps
Deploy LLMs safely with mission-critical AI tools.
Like Portkey, HoneyHive is in the Apps category. Both are freemium. Worth comparing on the detail page.
44 more free/freemium alternatives listed below. Browse all Portkey alternatives ↓
50 free or freemium alternatives to Portkey on /tools/portkey/alternatives.
Like Portkey, Lowtech is in the Apps category. Both are freemium. Worth comparing on the detail page.
