Overslash vs ThunderPhone v2

One gateway between your agent and every service it touches. OAuth, secrets, approvals, and audit, handled.

Voice AI that nails the calls others fumble: build, test, and deploy production phone agents on one integrated stack, in 47 languages, from 2 cents per minute.

About Overslash

One gateway between your agent and every service it touches. OAuth, secrets, approvals, and audit, handled. What it does One gateway between your agent and everything else. It handles secrets, OAuth, MCP, human approvals, and authenticated HTTP execution. Any MCP-capable agent, Claude Code, Overfolder, OpenClaw, or your own, connects to Overslash once. When you want to bring colleagues, create a Team org at €3 per seat. It will follow the skill, enroll itself under your Overslash account, and ask you for permissions as they come up.

About ThunderPhone v2

Voice AI that nails the calls others fumble: build, test, and deploy production phone agents on one integrated stack, in 47 languages, from 2 cents per minute. ThunderPhone holds the record, so you can trust it to make fewer mistakes on your calls. At every level of intelligence, ThunderPhone is the most cost-effective option on the market. Whether your calls are customer support, scheduling, pre-sales, or more, ThunderPhone can make them run smoothly. Place or receive calls, or run bulk outbound campaigns with pacing and retries.