What is Flowstack?
Integrating Large Language Models (LLMs) into your applications opens up incredible possibilities, but it also brings new challenges. Keeping track of API calls, understanding token consumption, managing costs across different models, and ensuring smooth performance can quickly become complex. Flowstack provides the essential analytics, monitoring, and optimization tools specifically designed for LLM-powered applications, helping you regain clarity and control with minimal setup.
Flowstack is built for developers and teams like yours who need straightforward visibility into how their LLMs are being used. Instead of grappling with generic monitoring tools or building custom logging systems, you can get detailed, LLM-specific insights by adding just two lines of code to your existing API calls. This allows you to focus on building great features, confident that you understand the operational aspects of your AI integration.
Key Capabilities
📊 Monitor Comprehensive Usage: Track key metrics including API requests, token counts (prompt and completion), cache hits, and overall activity patterns. This gives you a clear picture of how users interact with your LLM features.
💰 Analyze Detailed Costs: Understand precisely how much different users, specific API requests, or various LLM models are costing you. Break down expenses to identify high-cost areas and make informed decisions about resource allocation.
⚙️ Optimize LLM Performance & Spend: Easily implement essential optimizations without deep code changes. Add remote caching to reduce latency and cost for repeated queries, set rate limits to prevent abuse or unexpected spikes, and enable automatic retries for transient network issues.
🔍 Search and Filter Interaction Data: Use powerful search capabilities to find specific keywords across your request and response data. Apply filters across multiple columns to quickly isolate interactions based on user ID, model used, keywords, or other parameters for debugging or analysis.
🔌 Integrate with Minimal Effort: Get started in minutes. Simply update the base URL in your LLM API calls and include your Flowstack API key. There’s no need for complex SDKs or infrastructure changes. View the documentation for examples using cURL, Python, and Node.js.
🌐 Utilize Broad LLM Compatibility: Flowstack works seamlessly with many popular LLM providers. It currently supports OpenAI, Anthropic, AI21, AWS Bedrock, Google Cloud Vertex AI, and Mistral, allowing you to monitor diverse models from a single platform.
Practical Scenarios with Flowstack
Imagine how Flowstack could simplify your workflow:
Controlling Spiraling Costs: Your application uses multiple LLMs, and costs are climbing unexpectedly. Using Flowstack's cost analytics, you quickly identify that a specific, newly launched feature relying on a premium model is responsible for 70% of the increase. You can now decide whether to optimize the feature's prompts, switch to a more cost-effective model for certain tasks, or adjust user access.
Improving Application Responsiveness: Users report occasional slowness when using an AI-powered summarization tool. Flowstack's monitoring shows frequent, identical requests hitting your LLM. By enabling Flowstack's remote caching with a single setting toggle, you serve these common requests instantly from the cache, significantly reducing latency and API costs without writing custom caching logic.
Debugging User-Reported Issues: A user reports receiving strange or irrelevant responses from your AI assistant. Using Flowstack's search function, you filter logs by that user ID and search for keywords related to their query. You quickly find the exact request and response pairs, allowing you to analyze the prompt and model behavior to diagnose and fix the underlying issue.
Take Control of Your LLM Operations
Flowstack offers a practical, easy-to-implement solution for understanding and managing your LLM usage and costs. By providing clear analytics and straightforward optimization tools, it empowers you to build and scale AI features more confidently and efficiently. During our beta period, Flowstack is available completely free, offering unlimited usage and priority support in exchange for your valuable feedback.
More information on Flowstack
Launched
2023-05
Pricing Model
Free
Starting Price
Global Rank
10914910
Follow
Month Visit
<5k
Tech used
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Top 5 Countries
62.04%
37.96%
United States
India
Traffic Sources
7.41%
1.52%
0.19%
13.2%
36.27%
40.65%
social
paidReferrals
mail
referrals
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direct
Source: Similarweb (Sep 25, 2025)
Flowstack was manually vetted by our editorial team and was first featured on 2025-05-05.
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