The short answer
We track 8 Postman alternatives in this directory. 7 of them can be used without paying — LoadTester, MadeOnSol, Workstudio. We have checked 1 of these listings by hand to confirm the product is live and does what it claims.
Closest match: LoadTester — HTTP and API load testing without the infrastructure mess..
Postman alternatives at a glance
| # | Tool | Pricing | Category | Listing checked |
|---|---|---|---|---|
| 1 | LoadTester HTTP and API load testing without the infrastructure mess. | Free tier | Developer Tools | Not yet |
| 2 | MadeOnSol The discovery + intelligence layer for the Solana ecosystem. | Free tier | Developer Tools | Not yet |
| 3 | Sheetfy Turn your Google Sheet into an API | Paid | No-code | |
| 4 | Workstudio Build APIs and Backend Applications 10x Faster | Free tier | Developer Tools | Not yet |
| 5 | SQL Designer Free and Open Source ERD tool for all popular relational databases | Free | Developer Tools | Not yet |
| 6 | Void Relay The email Api for your own smtp provider | Free | Developer Tools | Not yet |
| 7 | HookPulse Schedule webhooks and API calls to run at an exact time | Free tier | Developer Tools | Not yet |
| 8 | BoltShot "Screenshot API for developers" | Free tier | Developer Tools | Not yet |
“Listing checked” is the date we last confirmed the tool is live and matches its description. Pricing is the tool’s own tier; confirm current prices on its site before buying.
1. LoadTester
HTTP and API load testing without the infrastructure mess.
LoadTester helps developers and teams run HTTP and API load tests without setting up load testing infrastructure. Create a test, choose virtual users or requests per second, monitor live latency and error rates, review completed results, compare runs, and catch performance regressions before users notice. It includes exports, scheduled tests, API access, and workflow integrations for teams that want simple, repeatable performance checks.
2. MadeOnSol
The discovery + intelligence layer for the Solana ecosystem.
MadeOnSol is the discovery and intelligence layer for the Solana ecosystem. We catalog 1,100+ tools across 30 categories — wallets, DEXes, trading bots, snipers, AI agents, MCP servers, NFT platforms, dev tools, and more — with community reviews, upvotes, side-by-side comparisons, and a curated alternatives index for every category.
3. Sheetfy
Turn your Google Sheet into an API
Sheetfy connects directly to your Google Sheets and Google Drive spreadsheets and turns them into secure, ready-to-use REST APIs in minutes. Instead of spending days building, deploying, and maintaining a backend, you can use Sheetfy to expose your spreadsheets as APIs and focus entirely on your product or automation.
4. Workstudio
Build APIs and Backend Applications 10x Faster
Workstudio is a NoCode tool for Engineering teams, indie hackers, startups and developers to build and ship Production Ready and Multi environment APIs, Backend services, and Automations 10x Faster and cheaper than traditional development
5. SQL Designer
Free and Open Source ERD tool for all popular relational databases
SQL Designer is a free, browser-based tool for visually designing database schemas. Drag out tables, define columns and relationships, and get a clean entity-relationship diagram — no install, no account needed to start. Built for developers who want to plan their data model before writing migrations.
6. Void Relay
The email Api for your own smtp provider
I built Relay Beta for developers who want real control and real scale. You bring your own SMTP server, I provide a fast edge-native Email API with per-server API keys, robust webhooks, and delivery metrics. The goal is simple: lower costs, fewer limits, and zero vendor lock-in. This is the very first, very fast version—we’re in Beta, and every bit of feedback matters. Early adopters will shape features, security refinements, and performance tweaks as we iterate.
7. HookPulse
Schedule webhooks and API calls to run at an exact time
Building an AI agent or a B2B integration is only step one. Keeping it running reliably at scale is the real challenge. Engineering teams waste thousands of hours building custom retry logic, debugging cron jobs, and managing internal event queues just to prevent silent failures. Hookpulse replaces your fragile internal queues with a robust, serverless backbone designed for modern developers. We handle the reliability so you can focus on building your core product. Key Features: • Guaranteed Delivery: Built-in automatic retries with exponential backoff. Never drop a webhook again.
8. BoltShot
"Screenshot API for developers"
BoltShot is a website screenshot API that turns URLs into high-quality screenshots in formats like PNG, JPEG, WebP, and PDF all through a simple API request. It supports full-page capture, device emulation for mobile, tablet, and desktop, and custom viewport settings for flexible rendering. Users can capture specific page elements using CSS selectors, while built-in features like ad blocking, cookie banner removal, and smart caching help produce clean, efficient results.
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