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Description
ReqKey enhances the API you control by incorporating key features such as API key authentication, usage credits, rate limiting, and analytics for requests. It operates with your custom middleware, which performs a single verification call for each incoming request; in this process, ReqKey checks the validity of the caller’s key, subtracts a usage credit from the consumer's balance, imposes their rate limit, and logs the request along with details like status code, latency, and location. Notably, it does not act as a proxy, gateway, or require any DNS modifications, ensuring that it does not introduce additional latency into your critical operations. The average validation time is under 5 milliseconds, and the credit system is designed to be per consumer, meaning that issuing a second key to a customer does not increase their quota, keeping balances consistent across different regions. Additionally, ReqKey offers features such as shadow limits, managed overages, reusable plans, alerts for low credits, and detailed logs that can be filtered by endpoint, status, consumer, and time period. In terms of usage tracking and billing, ReqKey accurately meters and monitors usage while allowing you to retain control over your own billing infrastructure. It also provides software development kits (SDKs) for various programming languages including Python, Node.js, Go, Rust, PHP, .NET, and Java, along with framework adapters compatible with FastAPI, Express, Django, and more, ensuring seamless integration into your existing applications. By offering this comprehensive suite of functionalities, ReqKey empowers developers to manage their APIs with greater flexibility and insight.
Description
Solvimon replaces home-built billing code. It is one API-first system for usage metering, pricing, quote-to-cash, invoicing, payments, and revenue recognition.
Send raw events (tokens, API calls, agent actions) via API or ingest them from Snowflake, BigQuery, Redshift, S3, GCS, or Azure Blob Storage. Solvimon aggregates them against meters, prices them with whatever model you sell (seats, usage, credits, commits with overages, outcome-based, or all of it on one contract), and produces the invoice. Payments run through Stripe, Adyen, or Checkout.com, so no PSP lock-in.
Tooling: REST API, SDKs, frontend components, a CLI, and an MCP server for agent-driven billing operations. Sandbox available without a sales call.
The team previously built billing at Adyen (€1T+ processed volume). Pricing changes ship as configuration, not as a rewrite of your invoicing pipeline.
API Access
Has API
No
API Access
Has API
Yes
Integrations
Adyen
No
Amazon Redshift
No
Amazon S3
No
Attio
No
Avalara
No
Azure Blob Storage
No
Campfire
No
Checkout.com
No
Claude
No
DATEV
No
Integrations
Adyen
Yes
Amazon Redshift
Yes
Amazon S3
Yes
Attio
Yes
Avalara
Yes
Azure Blob Storage
Yes
Campfire
Yes
Checkout.com
Yes
Claude
Yes
DATEV
Yes
Pricing Details
$0 (free tier), $25/month Pro
Free tier; paid plans from $25/mo for 500K requests, with lower per-request pricing at higher volumes.
Free Trial
No
Free Version
Yes
Pricing Details
Free for up to $3M
Solvimon prices as a percentage of billed revenue processed through the platform, plus payment processing fees. No event limits on any plan. Three plans: AI Essentials (free for the first $3M in billed revenue, then 0.4% of volume, for qualifying AI startups), Growth (starting at $2,500/month, adds quoting, multi-entity billing, and CRM/ERP integrations), and Enterprise (custom pricing, with custom rate cards, dedicated implementation engineer, and SLA-backed uptime). A read-only sandbox is available.
Free Trial
No
Free Version
Yes
Deployment
Web-Based
Yes
On-Premises
No
iPhone App
No
iPad App
No
Android App
No
Windows
No
Mac
No
Linux
No
Chromebook
No
Deployment
Web-Based
Yes
On-Premises
No
iPhone App
No
iPad App
No
Android App
No
Windows
No
Mac
No
Linux
No
Chromebook
No
Customer Support
Business Hours
No
Live Rep (24/7)
No
Online Support
Yes
Customer Support
Business Hours
Yes
Live Rep (24/7)
Yes
Online Support
Yes
Types of Training
Training Docs
Yes
Webinars
No
Live Training (Online)
No
In Person
Yes
Types of Training
Training Docs
Yes
Webinars
Yes
Live Training (Online)
Yes
In Person
Yes
Vendor Details
Company Name
ReqKey
Founded
2026
Website
www.reqkey.com
Vendor Details
Company Name
Solvimon
Founded
2022
Country
Netherlands
Website
www.solvimon.com
Product Features
API Management
API Design
No
API Lifecycle Management
Yes
Access Control
Yes
Analytics
Yes
Dashboard
Yes
Developer Portal
Yes
Testing Management
No
Threat Protection
No
Traffic Control
Yes
Version Control
No
Product Features
Recurring Billing
Customer Portal
No
Deferred Billing
No
Discount Management
No
Dunning Management
No
Invoice History
No
Multi-Currency
No
Multi-Period Recurring Billing
No
Payment Processing
No
Recurring Donations
No
Subscription Billing
No
Subscription Management
Cancellation Management
No
Discount / Coupon Management
No
Dunning Management
No
Enrollment Management
No
Product Catalog
No
Recurring Billing
No
Revenue Recognition
No
Revenue Recovery Tools
No
Self Service Portal
No
Subscription Plan Management
No
Tax Management
No
Trial Management
No
Usage Tracking/Analytics
No