Ada vs Plain

Ada is an AI customer service platform from Toronto, founded in 2016 by Mike Murchison and David Hariri. It started as a no-code chatbot builder and has repositioned itself as an agentic customer experience platform: AI agents that answer and resolve customer inquiries end to end across messaging, email and voice, rather than deflecting them to a help article.

The agent orchestrates several large language models, reads your knowledge base, and uses Actions to call your systems so it can look up orders, change bookings or issue refunds. Playbooks encode multi-step standard operating procedures, and the platform includes testing, coaching, analytics and an automated resolution metric to track how many conversations finish without a human. Ada lists SOC 2, HIPAA, GDPR and PCI DSS compliance. There is no self-serve plan: pricing is quote-based after a sales demo.

Ada fits large consumer brands with hundreds of thousands of support conversations a year, such as Pinterest, monday.com, Grab and Life360. Smaller teams usually get faster value from Intercom Fin or Tidio Lyro, which price per resolution and install in an afternoon. Zendesk AI agents make more sense if you want to stay inside one helpdesk vendor, and Decagon and Sierra are the main newer enterprise rivals.

In February 2026 Ada launched a unified Reasoning Engine that powers its agents across all channels from one intelligence layer. When evaluating, ask for a pilot on your own transcripts and compare the automated resolution rate, not deflection, against your current baseline.

Plain is a customer support platform built for B2B and technical companies, based in London. Instead of assuming customers will submit tickets through a form, it is designed around the channels B2B customers actually use: shared Slack Connect channels, Microsoft Teams, Discord, email, in-app chat and forms, all flowing into one fast, keyboard-driven inbox.

Plain's API-first design lets companies enrich every thread with customer data such as plan, account owner or usage, so routing and prioritization can use tiers, SLAs and customer importance. Threads can be linked to Linear and Jira issues so engineering and support stay in sync, and status updates flow back to customers. AI features triage incoming messages, summarize long Slack threads, suggest replies and power an AI agent that answers routine questions from documentation. Pricing is per seat: Foundation covers small teams with Slack, email, in-app chat and the AI agent; Horizon adds Microsoft Teams, SLAs, a help center and CRM integrations; and custom-priced Frontier adds SSO, SCIM and advanced security.

Plain suits developer-tool, infrastructure and B2B SaaS companies whose customers expect support in shared Slack channels and whose support engineers want a modern tool. It is less suited to high-volume consumer support and has fewer integrations than Zendesk or Intercom. Pylon is its closest competitor for Slack-based B2B support, Thena covers similar ground, and Front works well for email-heavy B2B teams.