Alternatives

Products that do what SP API does

Enterprise conversational AI API with ultra-low latency

1
Conversation API▲275
Build chatbots with memory using just an API
Jan 2026 · amarsia.com
2
Api.ai for Facebook Messenger▲847
The easiest way to build an FB bot. No coding required!
2016
3
Conversational AI 2.0 From ElevenLabs▲654
Powering the next-gen of smart, trusted voice agents
2025 · elevenlabs.io
4
Init.ai▲506
Build powerful and intelligent conversational apps 💁🤖
2016
5
Api.ai for Slack▲414
Build a smart conversational Slack bot in 5 minutes.
2016
6RT
Real-time AI Voice Chat at ~500ms Latency▲524
2025 · github.com
7
Le Chat▲495
Your AI assistant for life and work
2025
8
API.AI for Google Assistant▲380
Build conversation actions for Google Home and more
2016
9
Talkstack AI▲465
Create 1000 sales and customer support agents in a click
2024
10OS
Open source alternative to ChatGPT and ChatPDF-like AI tools▲234
Hey everyone, We have been building SecureAI Tools -- an open-source application layer for ChatGPT and ChatPDF-like AI tools. It works with locally running LLMs as well as with OpenAI-compatible APIs. For local LLMs, it supports Ollama which supports all the gguf/ggml models. Currently, it has two features: Chat-with-LLM, and Chat-with-PDFs. It is optimized for self-hosting use cases and comes with basic user management features. Here are some quick demos: * Chat with documents using OpenAI's GPT3.5 model: https://www.youtube.com/watch?v=Br2D3G9O47s * Chat with documents…
2023 · github.com
11
ChatGPT Enterprise▲329
Enterprise-grade security, privacy and powerful ChatGPT
2023
12
Conversational AI by ElevenLabs▲308
Build AI agents that speak
2024
13
Opper AI▲229
The european AI gateway for agents
Jul 2026 · opper.ai
14
alphachat▲122
Automate your SaaS support with powerful conversational AI
2021
15IO
I open-sourced my AI toy company that runs on ESP32 and OpenAI realtime▲177
Hi HN! Last year the project I launched here got a lot of good feedback on creating speech to speech AI on the ESP32. Recently I revamped the whole stack, iterated on that feedback and made our project fully open-source—all of the client, hardware, firmware code. This Github repo turns an ESP32-S3 into a realtime AI speech companion using the OpenAI Realtime API, Arduino WebSockets, Deno Edge Functions, and a full-stack web interface. You can talk to your own custom AI character, and it responds instantly. I couldn't find a resource that helped set up a reliable, secure websocket (WSS) AI…
2025 · github.com
16
LyzrGPT▲162
Private, secure & model-agnostic AI chat for enterprises
Jan 2026 · lyzr.ai
17
Agentset▲92
APIs for building AI chat and search
Feb 2026 · agentset.ai
18
Quickchat▲81
No-code AI chat bot builder, powered by OpenAI API
2021
19
Sun▲110
Collaborative voice API for agents
Jun 2026 · getsun.io
20SB
ServerlessAI – Build, scale, and monetize AI apps without back end▲86
Hello HN, I’ve always loved building frontend-only apps—those you can prototype over a weekend, host for free on GitHub Pages, and scale to millions of users. Unfortunately, AI-enabled apps complicate things, as exposing your OpenAI key to the world is obviously a no-go. This also means mobile developers often have to run their own servers. That’s why I built ServerlessAI, an API gateway that lets you securely call multiple AI providers directly from client side using OpenAI-compatible APIs. You can authenticate users through any identity provider, like Google or Apple, and set per-user…
2024 · serverlessai.dev
21
What are conversational bots?▲102
An introduction to and overview of AI-driven chatbots
2016
22AL
A lightweight way to make agents talk without paying for API usage▲58
Apr 2026 · juanpabloaj.com
23
Quietly▲59
Offline AI IDE & local Chat
May 2026 · quietlycode.org
24
API Pick▲71
Data APIs for AI agents & developers — free to start
Feb 2026 · apipick.com

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