The most upvoted software on Alternivo. Upvotes come from signed-in members only.
Create and launch websites or online stores fast with Hostinger Website Builder’s drag-and-drop editor, AI tools, hosting, domain, and built-in marketing.
Website Builders

HubSpot's customer platform includes all the marketing, sales, customer service, and CRM software you need to grow your business.
CRM

Hugging Face is the community hub to discover, host and collaborate on machine learning models, datasets and apps, with compute, APIs and enterprise tools.
Models

HuggingChat is a web chat app for conversing with open‑source AI models, featuring Omni for automatic model selection and an ML Intern mode for ML tasks.
Chatbots

Enterprise platform to build, evaluate, and monitor LLM applications with prompt management, automated and human evaluations, and production observability.
LLM Evaluation
Humata turns documents into a searchable knowledge base, delivering cited answers, summaries, and comparisons with controls for teams and enterprise-grade security.
Document AI

Hume AI provides evaluation, benchmarks, and APIs to measure and improve emotionally aware voice AI across 600+ expression dimensions in 50+ languages.
Voice Agents

HyperWrite is an AI writing assistant with a web editor and Chrome extension for drafting, research with citations, email replies, rewriting, and custom personas.
Writing Assistants

AI-first PXM for ecommerce that enriches product data, automates tagging, generates on-brand descriptions, enhances images, and tracks content performance.
Copywriting

Ideogram is a generative media platform for AI image creation and editing, with readable text, editable layers, custom models, and an API for creative apps.
Image Generation
Imagine Art is a web creative platform that generates and edits images, video and audio with 50+ models, plus workflows, studios and shared collaboration.
Image Generation
InVideo is an agentic AI video editor where Agent Two and custom agents help plan, edit, and finish videos on a professional timeline using natural language.
Video Editor

Instantly is a sales engagement and lead intelligence platform that finds B2B leads, runs AI‑driven outreach, and manages replies, pipeline, and revenue.
Lead Generation

Intercom Fin is an AI customer agent that handles support, sales, ecommerce and success end-to-end, learning from every interaction to improve results.
Customer Support

Interior AI lets users upload room photos to generate photorealistic redesigns in chosen styles and virtually stage empty spaces for real estate.
Home Design

Inworld AI provides realtime TTS, STT, speech-to-speech, and open LLM inference for consumer apps, delivering sub‑100 ms first audio and global region coverage.
Gaming
Ironclad is an AI-enabled contract lifecycle platform to draft, negotiate, sign, and analyze all contract types while managing risk and surfacing insights.
Contract Management

Jan is an open-source ChatGPT alternative that runs open models locally or connects to cloud AI like GPT, Claude, Gemini, Llama, Mistral, and more.
Local LLMs

Jasper is a marketing AI platform with agents, pipelines, and brand governance to plan, create, localize, and optimize content across channels.
Copywriting

JetBrains AI Assistant brings AI chat, code generation, and explanations into JetBrains IDEs to speed up coding, documentation, and everyday development tasks.
Code Assistant

Jina AI provides multilingual, multimodal embeddings, rerankers, and a web Reader API to power enterprise search, RAG, and LLM grounding from web and documents.
Search APIs for AI

Julius AI is a web-based workspace to research topics, analyze data, and create presentations, dashboards, websites, images, and video in one place.
Data

Juro is an AI-native contract management platform to draft, review, approve, e-sign, store, and query agreements with integrations your teams use.
Contract Management

AI-powered 3D asset service turning sketches, photos, and briefs into production-ready models fast, with markup, revisions, and secure, IP-safe delivery.
3D

Kagi is a privacy-first search engine and toolset offering ad‑free results, private browsing, translation, summaries, and curated news without tracking.
Search Engines

Kapwing is a video creation and editing platform that turns simple prompts into full projects and helps teams produce, localize, and collaborate on content.
Video Editor

Khanmigo is Khan Academy’s AI teaching assistant and tutor that guides learning, streamlines teacher prep, and supports writing and coding practice.
Learning Tools

Kickresume is an online resume and cover letter builder with AI writing, ATS checks, and recruiter‑approved templates to help job seekers apply faster.
Resume Tools

Kimi is an AI workspace with K3 for agentic coding and knowledge work, offering no‑code app building, slides, docs, spreadsheets, deep research, and multi‑agent automation.
Chatbots

Kits AI provides studio-quality voice cloning, singing generators, TTS, vocal isolation, stem splitting, mastering, and instruments with a royalty-free voice library.
Voice Cloning

Kittl is a browser-based AI design platform for commerce, combining image/video/vector generation, pro editing, mockups, and curated templates—free to start.
Graphic Design

Klaviyo is an autonomous B2C CRM and AI marketing platform that unifies data, channels, and agents to run personalised, revenue‑driving campaigns and service.
Email Marketing

Kling AI is a cross-platform studio for generating videos and images from text, images, and references, with 4K output, audio, and multi-shot control.
Video Generator

Koala AI is an AI SEO platform with an agent that plans from Search Console data, drafts on-brand articles, and publishes to your CMS in one click.
SEO

Krea is a web-based AI creative suite to generate, edit, and enhance images, videos, and 3D assets, with real-time tools and access to leading models.
Image Generation

Krisp is a Voice AI platform for clear calls, uniting noise cancellation, accent conversion, and a bot-free AI note taker for meeting transcripts and summaries.
Meeting Assistants

LALAL.AI is an AI vocal remover and stem splitter that isolates instruments, cleans and transforms voice, with apps, plugins, and API for audio and video.
Audio

LTX Studio is a web-based creative studio for AI video production that turns scripts, prompts, images, or footage into production-ready videos with precise control.
Video Generator

Labelbox builds AI training environments and event-driven agents that take recurring engineering, research and operations work from trigger to finished output.
Data Labeling

Lakera is an AI-native security platform that protects GenAI apps, agents, and workforce use with real-time threat detection, data protection, and centralized policies.
AI Safety & Guardrails
Lambda is a GPU cloud for AI training and inference, offering on‑demand instances, self‑serve clusters, and single‑tenant superclusters on the latest NVIDIA systems.
Model Hosting & Inference

Multimodal lakehouse and vector database to curate data, engineer features, train models, and run high-scale retrieval on the open Lance format.
Vector Databases

LangChain is an open agent platform to build, test, deploy, monitor, and govern model‑powered agents across open‑source frameworks and managed services.
Agent Frameworks

Complete AI agent and LLM observability platform with tracing and real-time monitoring. Debug agents, find failures fast, and track costs and latency.
Observability

Langflow is a low-code AI builder for agentic and retrieval-augmented generation (RAG) apps. Code in Python and use any LLM or vector database.
Agent Frameworks

Trace, evaluate, and improve AI agents with one open platform. Use production data to understand behavior, collaborate on fixes, and ship better quality at lower cost and latency.
Observability

Instantly check grammar, punctuation, and spelling errors with LanguageTool's AI-powered grammar checker. Enhance your writing in over 30 languages with ease.
Writing Assistants

Join 5,000+ forward-thinking teams using Lattice’s HR and AI tools to manage people and performance — all on one trusted platform.
HR

Lavender helps thousands of sellers around the world write better emails faster and get more positive replies in less time.
Email Assistants

The world's best AI travel planner 4.9★ . Get tailored itineraries & epic road trips. From chat to checkout.
Travel