1
Also covers ai chat and image generation · same kind of online tool
Perchance provides online AI character chat with no sign-up and supports AI-generated images.
Alternatives
The Best Custom Api Alternatives in 2026
24 alternatives3 free · 1 open source
Looking for something like Custom Api? Here are 24 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 3 are free or have a free plan and 1 are open source.
About Custom Apiperchance.org/amoled-chat
VisitPerchance provides online AI character chat with no sign-up, as described by the linked page.
Top picks at a glance
First suggestionPerchancePerchance provides online AI character chat with no sign-up…Open source optionOdysseusOdysseus provides a self hosted AI workspace with chat…Another optionChatboxChatbox brings several AI models into one app for chat and…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | Perchance | Free | Not stated | Web |
| 2 | Chatbox | — | Not stated | Android, iOS, Web |
| 3 | Character.ai | — | Not stated | Web |
| 4 | Character.AI | — | Not stated | Web |
| 5 | Urv AI Chat | — | Not stated | Web |
| 6 | 4thWall AI | — | Not stated | Web |
| 7 | Mendable | — | Not stated | Web |
| 8 | Quartzite | Paid | Not stated | Web |
| 9 | ChatPDF | — | Not stated | Web |
| 10 | ChatHelp.ai | — | Not stated | Web |
All Custom Api alternatives
2
Chatbox
chatboxai.appAlso covers ai chat and image generation · same kind of online tool
Chatbox brings several AI models into one app for chat and work using user supplied API keys.
3
Character.ai
character.aiAlso covers ai chat
Chat with AI characters through Character.ai, which offers conversations with many characters.
4
Character.AI
beta.character.aiAlso covers ai chat
Character.AI offers chat conversations with AI characters through its app.
5
Urv AI Chat
perchance.org/urv-ai-chatAlso covers ai chat · same kind of online tool
URV AI offers chat with language models, character creation, and image generation.
6
4thWall AI
beta.4wall.aiAlso covers ai chat
4thWall AI provides an interactive chat platform for conversations with AI characters.
7
Mendable
mendable.aiAlso covers ai chat · same kind of online tool
Mendable helps developers build AI chat applications by ingesting technical content and deploying answers with a line of code.
8
Also covers ai chat · same kind of online tool
Quartzite provides a chat interface for multiple language models with tools for research, complex prompts, learning, and writing.
9
ChatPDF
chatpdf.comAlso covers ai chat · same kind of online tool
ChatPDF brings ChatGPT-style intelligence and PDF AI technology together for smarter document understanding. Summarize, chat, and analyze.
10
ChatHelp.ai
chathelp.aiAlso covers ai chat · same kind of online tool
ChatHelp.ai offers a business, work, and study assistant, a website chat widget, and curated AI tools and agents.
11
Ajelix
ajelix.comAlso covers ai chat · same kind of online tool
Ajelix provides AI chat and spreadsheet tools for data analysis, finance, marketing, presentations, and Google Workspace apps.
12
Netus AI
netus.aiAlso covers ai chat · same kind of online tool
Netus AI offers an AI text humanizer, an AI detector, and a chat interface for several AI assistants.
13
EasyChat AI
easychat-ai.appAlso covers ai chat · same kind of online tool
EasyChat AI provides a Windows desktop chat assistant for writing, learning, and working with ideas, with optional user-supplied API keys.
14
PyGPT
pygpt.netAlso covers ai chat · same kind of online tool
PyGPT provides an open-source desktop AI assistant for chat, agent building, and retrieval-augmented knowledge access.
15
AI-Chat-to-Visual
huggingface.co/spaces/Agents-MCP-Hackathon/AI-…Also covers ai chat · same kind of online tool
This app creates Altair visualizations from uploaded datasets and chat instructions.
16
Also covers ai chat · same kind of online tool
Woozlit offers free AI chat and image generation tools through its online service.
17
Merlin
getmerlin.inAlso covers ai chat · same kind of online tool
Merlin offers an AI chat interface for accessing models such as ChatGPT and Gemini to research, write, code, and create images.
18
Also covers ai chat
Microsoft Copilot provides AI chat for answering questions, writing, image creation, work tasks, and coding.
19
Also covers ai chat · open source
Odysseus provides a self hosted AI workspace with chat, agents, tools, model serving, email, and research.
20
Also covers ai chat
Flashcards, presentations, chat, images, video, and citation creation are among the study tools in myStylus AI.
21
ChatSonic
writesonic.com/chatAlso covers ai chat
ChatSonic combines AI chat with marketing workflows, research, and connected tools.
22
Scinito
ekb.scinito.ai/ai/chatAlso covers ai chat
Scinito lets users chat with, search, analyze, and manage scholarly data using AI tools.
23
RabbitHoles AI
slashspace.aiAlso covers ai chat
Slashspace, formerly RabbitHoles AI, is an infinite canvas for AI chat and research.
24
Thena
thena.aiAlso covers ai chat
Thena provides customer-support ticketing and AI chat for B2B teams across Slack, email, and web chat.
No alternatives match this filter.
Alternatives to similar tools
Microsoft Copilot24 alternativesChatbox24 alternativesNetus AI5 alternativesChatPDF24 alternativesOdysseus24 alternativesRabbitHoles AI24 alternatives
What is the best alternative to Custom Api?
Based on features, tags and platforms, the closest alternatives to Custom Api are Perchance, Chatbox, and Character.ai.
Is there a free alternative to Custom Api?
Yes. Perchance, Woozlit, and Odysseus are free or offer a free plan.
Are there open-source alternatives to Custom Api?
Yes: Odysseus.
Alternatives are suggested from the purpose and features described in our listings. Different pages for the same product appear once. Read each description to check whether it fits your task. How we choose alternatives · Suggest an alternative