15,347 tools
Compare plans, free tiers and API access across thousands of AI tools — every fact carries its source and check date.
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Catalog
Free trialAssistant
Stacker builds AI agents that work alongside teams in Slack to answer questions, manage data, and automate workflows across more than two thousand integrations. Credit-based Standard plans include unlimited agents, customer portals, scheduled automations, computer-use features, and knowledge bases, with Enterprise options for custom volumes and security reviews.
Free tier unknownAssistant
Stackify is an AI copilot for SaaS stack optimization aimed at consultants and fractional COOs serving fast-growing SMEs. The site positions it to rationalize software stacks, cut waste, modernize workflows, and prove ROI on day one with AI-powered recommendations and tracking.
Free tier unknownAssistant
StackNinja is an AI dietary supplement coach that builds personalized supplement protocols from blood tests, scientific research links, and daily check-ins. The marketing site focuses on buying guidance and protocol adherence rather than generic chat.
Free tier unknownDatabase design
StackRender is a database schema design tool with visual ER diagrams, SQL import, AI-assisted modeling, schema diffs, and migration generation. Developers use the web editor to evolve schemas, produce versioned migrations, and roll back changes from one workspace.
Free tier unknownCode
Stacks (betterstacks.com) is a personal knowledge workspace that unifies bookmarks, files, notes, and feeds with context-aware AI agents for memory and discovery. Paid tiers add storage, shared workspaces, and branded collections for teams or creators.
Free planAutomation
StackStorm is event-driven automation software that connects apps, services, and runbooks into workflows for ChatOps, remediation, CI/CD, and security response. The open-source engine integrates with existing infrastructure and is used by enterprises such as Netflix for diagnostic and remediation platforms.
Free to startVideo Generation
Stacktree publishes HTML work as private client pages and can turn a page into a short, silent AI-generated walkthrough video. Page Video uses the page’s design and content to prepare an animated summary, checks statements against the source and presents the draft for approval. API and MCP publishing let coding agents hand off generated reports and proposals as links.
Free planAssistant
Stackup provides onchain treasury and payments infrastructure with smart contract wallets, stablecoin yield, gas abstraction, and banking on- and off-ramps for startups, enterprises, and individuals. The Free tier covers solo users on two chains, while Pro adds team access, twelve-plus chains, lower swap fees, and API-ready payment features.
Free tier unknownAssistant
StafBook is an all-in-one HR, expense, and task management platform for Indonesian businesses, covering shift scheduling, attendance, leave policies, reimbursements, and employee self-service.
Free trialWriting
StaffingLeads is an AI business-development agent for staffing firms and recruiters. It monitors hiring, funding, network, and past-client signals, identifies decision-makers, and automates personalized email and LinkedIn outreach so teams can respond while roles are fresh.
Free planCode
Stagehand is an open-source SDK for browser agents from Browserbase. It combines Playwright-style page control with self-healing AI primitives (act, extract, observe) in TypeScript, Python, and Go, designed to run close to the browser for low-latency automation in production agent workflows.
Free planAssistant
Stager AI provides virtual staging, AI photo editing, listing video, and floor-plan tools for real estate media. Agents and photographers upload property photos, spend monthly photo credits, and export marketing-ready visuals with optional API access.
Free planCode
stagewise is an agentic IDE for open-source and frontier models that runs locally or via stagewise Cloud Inference, BYOK subscriptions, or custom endpoints. Hobby users get limited access to three standard models for free, while Pro unlocks all models with extendable credits and Enterprise adds SSO, SCIM, and compliance controls.
Free planAssistant
Stakpak is an open-source autonomous agent that runs on your machines to keep applications healthy, respond to incidents, and report through chat channels. Paid cloud tiers add managed LLM credits, multi-app autopilot, and team billing.
Free planMail server
Stalwart is an all-in-one mail and collaboration server written in Rust with JMAP, IMAP, POP3, SMTP, CalDAV, CardDAV, and WebDAV in a single platform. It bundles anti-spam filtering, clustering, encryption, and enterprise licensing while offering a free community edition for self-hosters.
Free planImages
Stamina AI is a consumer mental-health chat product offering expert-backed AI therapy sessions with 24/7 access. The site emphasizes personalized CBT-oriented support, psychologist oversight, and thousands of structured session templates.
Free trialResearch
Stammer AI builds white-label AI chat and voice agents for agencies to deploy customer support, lead qualification, and appointment booking across messaging channels. The platform advertises no-code setup, human handoff, scheduling, and optional fully white-labeled branding on higher tiers.
Free trialAssistant
Stamp is an AI secretary for email and calendar that drafts replies, prioritizes messages, applies AI labels, and schedules meetings using memories and inbox context. Stamp Mode lets you approve bulk changes quickly, and mobile apps support chat and voice delegation on the go.
Free tier unknownImages
StampGenerator.net is an online AI stamp maker for company seals, medical stamps, and decorative seals. Users buy credit packs that never expire to generate high-resolution stamp artwork without hiring a designer.
Free planStatistics
Stan is open-source Bayesian modeling software with a probabilistic programming language, math library, and interfaces for Python, R, Julia, and the shell. Researchers use it for hierarchical models, time series, and validated inference workflows backed by extensive documentation and community forums.
Free tier unknownResearch
Standard Machines is a research company building environments and evaluations for advanced chip design. Its public site describes RL environments for long-horizon chip design work rather than a self-serve commercial software product.
Free tier unknownResearch
Standard Signal is an AI-native hedge fund that trains and deploys financial LLM models to research and execute trades within stated risk parameters. The site describes autonomous discovery of market opportunities rather than a downloadable trading product for retail users.
Free planResearch
Stanza is Stanford NLP’s open-source Python toolkit for multilingual linguistic analysis. Its neural pipeline tokenizes text, tags morphology and dependencies, recognizes entities, and optionally connects to CoreNLP for constituency parsing and coreference.
Free planAssistant
STAR Method Coach is an AI interview prep tool that trains behavioral interview skills using the STAR framework. Learners practice job-specific questions, get instant feedback, and can generate prompts from a resume or job description with 24/7 availability.
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