21X (formerly Structurely) review

Structurely was one of the first AI assistants built to qualify real estate leads by text. It now operates as 21X, a broader conversational AI platform for voice, SMS, RCS, email and chat across sales, service and support, and real estate is one of the use cases it lists alongside mortgage and insurance. The Small Team plan includes an agent builder with prebuilt agents, inbound and outbound voice, SMS and email workflows, call cadences and screening, live transfers, appointment scheduling and a lead uploader. Larger plans add multiple teams, routing logic, custom integrations, webhooks and A/B testing, and Enterprise opens APIs, MCP and white label deployment. Pricing is a platform fee, which is quote only, plus metered usage that 21X publishes: voice from $0.07 a minute with your own carrier, and SMS and AI email from $0.02 each. That makes it a fit for brokerages and lead platforms that want an AI call center, not for an agent who wants a widget.

Who it is for

Larger brokerages and lead platforms that want an AI call center for inbound and outbound conversations.

Price

See vendor pricing (USD check pending).

US price check pending. See the vendor pricing page.

Key features

• Inbound and outbound AI voice with call screening and campaigns
• SMS and email workflows with call cadences
• Live transfers and appointment scheduling
• Lead Uploader to start outreach on a list
• APIs, webhooks, MCP and white label deployment on Enterprise

Strengths and weaknesses

• Strength: Covers voice, text and email from one platform
• Strength: No per-seat licensing
• Strength: Usage rates are published
• Weakness: Platform fees are quote only
• Weakness: No longer focused only on real estate
• Weakness: More setup than a website chatbot

Key facts

• Voice usage: As low as $0.07 a minute with your own carrier
• SMS usage: As low as $0.02 a message
• Email usage: As low as $0.02 per AI email
• Support on Small Team: 1.5 hours a month

Where it ranks

21X (formerly Structurely) is No. 10 in our Best Real Estate Chatbots verdict.