
Enterprise developer platform and API for deploying GPT-6 Astra, Sol, Luna, and realtime multimodal agents.
Enterprise developer platform and API for deploying GPT-6 Astra, Sol, Luna, and realtime multimodal agents.
Callr records 2,657 monthly visits with -45.2% month-over-month growth and Free Trial, Paid pricing. Treg records 452,935 monthly visits with +223.4% growth and Freemium pricing.

API-first voice, SMS and AI conversation intelligence platform
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | callr.com | treg.to |
| Pricing Model | Free Trial, Paid | Freemium |
| Monthly Visits | 2.66K (2,657) | 452.94K (452,935) |
| MoM Traffic Delta | -2.19K (-45.2%) | +312.9K (+223.4%) |
| Primary Market & Share | 🇮🇳 India (68.8%) | 🇺🇸 United States (36.8%) |
| Direct Visits / mo | 1.04K | 235.3K |
| User Rating | 4.2 | 4.5 |
| Supported Platforms | Website | Website |

API-first voice, SMS and AI conversation intelligence platform
REST API, webhooks and serverless flows for inbound and outbound voice, SMS, email and IVR across 220+ countries on Callr's own carrier network.
Automatic transcripts, AI summaries, sentiment, intent, satisfaction scoring and campaign attribution generated from each call with prompts you control.
Low-code flow builder for agents that answer, qualify, book and resolve calls end to end, escalating to a human when it matters.
Connect GPT, Claude, Mistral, Llama or a private in-house model so extraction logic and data residency stay under your control.

One key for 4,100+ agent tools, pay per call
A single treg token routes to 4,100+ endpoints across 127 providers, so no per-provider signups or scattered key files.
See each provider's price plus measured success rate, speed, and last-answer time, and pin a preferred vendor when you want.
Pay fractions of a cent per call with the price shown before you commit, no monthly seats required.
Route calls through your existing provider keys at no markup; credentials are injected server-side and never stored on a machine.

Enterprise developer platform and API for deploying GPT-6 Astra, Sol, Luna, and realtime multimodal agents.
Enterprise developer platform and API for deploying GPT-6 Astra, Sol, Luna, and realtime multimodal agents.
One API key for hundreds of AI models from every major provider

Provides comprehensive pre-built tool integrations for AI agents, but lacks Treg's open-source pay-per-call API catalog.
Provides comprehensive pre-built tool integrations for AI agents, but lacks Treg's open-source pay-per-call API catalog.

Real-time voice AI models and agents you can build on

SpecialistProvides advanced browser automation and live web fetching, but lacks a general pay-per-call API marketplace.

SpecialistExcels at AI-optimized web search and crawling data, but lacks broader multi-app tool integration capabilities.
One OpenAI-compatible gateway for adaptive LLM routing, guardrails, and spend control
One OpenAI-compatible gateway for adaptive LLM routing, guardrails, and spend control
Real-time speech-to-text, text-to-speech and voice agents in one API platform
Real-time speech-to-text, text-to-speech and voice agents in one API platform

AI communication platform for sales and support teams
Build, test, and deploy production-grade voice AI agents over API

Free / Open-sourceOffers an open-source AI gateway for model routing, but focuses on LLMs rather than general data endpoints.

Offers universal B2B data and tool integrations for agents, but focuses less on pay-per-call API monetization.