3 respond.io Alternatives for WhatsApp and AI Calls
Choose Carly as a respond.io alternative when you want an AI assistant to work across business calls, SMS, WhatsApp, email and customer records. Trengo is worth evaluating for a support-oriented shared inbox, while Kommo fits sales organized around chat and pipeline stages.
The important distinction is not whether a platform has AI. respond.io already does. It also publishes a WhatsApp Business Calling offering, so a comparison should distinguish WhatsApp calls from ordinary phone-number calling instead of grouping them together.
Your customer may start on WhatsApp and ask for a phone call later. Establish which kind of call they expect, who will speak and where the result is recorded. Those details are more useful than a row labeled “voice: yes.”
This comparison is published by Carly, with public product information reviewed November 9, 2026. The recommendations are about fit, not independently measured superiority.
What customer reviews suggest checking
In respond.io’s G2 reviews, Noel B., an operations reviewer whose review was updated November 4, 2026, rated the product 5/5 and liked the workflow experience while requesting more flexible reporting and exports across open and closed conversations. That is a narrower concern than saying respond.io has no reporting.
Another reviewer, Mafe R., gave 5/5 but wrote, “I really dislike having to use templates after 24 hours have passed since the last message.” The displayed excerpt does not establish a review date or incentive status, so treat it as a reported frustration rather than a dated product defect.
The distinction matters: WhatsApp’s business messaging policy requires approved templates outside the customer-service window. Moving to another provider does not remove Meta’s rule. In a trial, include a customer who returns after the window has closed. Check the permitted template, ownership and resulting cost instead of expecting another inbox to bypass the platform requirement.
respond.io pricing: contacts and WhatsApp fees
respond.io’s pricing advertises Starter at $79/month and Growth at $159/month when billed annually. Growth includes AI agents and workflows. Those annual rates represent $948 and $1,908 per year before additional charges. Monthly billing differs.
The platform’s monthly active contact model and separate WhatsApp charges are essential to the comparison. WhatsApp fees are not included in the subscription. Ask how your contact volume is counted, what happens when it exceeds the allowance and how messaging and calling charges reach the bill.
An inexpensive shared-inbox plan is not necessarily the plan that automates lead routing. Equally, paying for AI agents may be unnecessary if your team primarily needs humans to answer in one inbox. Price the intended operating model and use the same expected volume for every vendor.
When respond.io remains the stronger fit
Keep respond.io if coordinated messaging is your core operation and its routing, ownership and reporting already work for the team. A move to Carly is more compelling when the missing work spans ordinary business phone calls, email and appointment rules—not simply because both products offer AI replies.
Specify how a customer is identified across channels before expanding. Someone may use one number on WhatsApp and another when calling the office. Ask the candidate product to demonstrate what it does with an unmatched contact and how a person corrects a mistaken match. Do not assume a marketing claim about a unified inbox guarantees perfect identity matching.
For reporting, bring one real management question: which qualified inquiries reached an appointment, and which still need a person? Have each vendor produce that answer from the trial’s conversations. An attractive dashboard that counts replies may not answer the buying question that led you to compare alternatives.
Compare the channels and the person doing the work
| Alternative | Primary buying case | Important distinction |
|---|---|---|
| Carly | AI agents handling calls, messages and bookings | Define when the agent acts and when staff take over |
| Trengo | A shared workspace for customer support conversations | Staff workflow matters alongside automated replies |
| Kommo | Messaging connected to a sales pipeline | The deal’s next action matters alongside the chat |
1. Carly: follow a customer from question to appointment
Carly gives businesses agents that can answer and place calls, send texts, respond on WhatsApp and work with email. The team CRM keeps customer records available, and connected calendars support appointment booking.
Think of a customer asking whether your business can help with a specific job. The agent should ask the relevant questions, use your approved information, offer an appropriate next step and recognize when the request needs a person. You can customize that behavior instead of relying on a generic sales script.
The same business may want staff to work through the dashboard while the owner asks ChatGPT or Claude about open conversations. Carly supports that style of working. It also connects to thousands of apps for the processes around the conversation.
Free Zapier-style workflows; AI agents from $35/month. Organization starts at $35 per seat/month. Check channel availability, setup and usage against your own workload rather than assuming every conversation has the same cost.
Carly cost and scope: Business SMS, calling and the AI receptionist are Organization add-ons billed separately from seats. Confirm channel availability and expected AI usage. Evaluate your required reporting, permissions and migration path before replacing an established CRM or phone system.
2. Trengo: a shared workspace for customer support
Trengo is worth comparing when the team’s daily job is resolving customer conversations across WhatsApp, email, live chat and other channels. Its shared inbox and AI features need to be evaluated together with the people handling exceptions.
The plan page bundles users and conversation allowances, so utilization affects the comparison with respond.io. Request a quote for your actual staff and conversation volume, including AI and channel charges. A package with spare seats is not necessarily expensive for a growing team, but those seats provide little value to a business that will not use them.
Test a reopened issue, an internal escalation and two colleagues attempting to help the same customer. Inspect ownership after each step. If the new system leaves a customer repeating context, the fact that every channel appears in one inbox is not enough.
Tradeoff: support resolution and sales-pipeline management are related but different jobs. Establish where an opportunity lives and where appointment changes are recorded. Keep respond.io if its existing routing and handoff already meet the requirements and the remaining gap is narrower than a full inbox replacement.
3. Kommo: make the sales stage visible
Kommo is the option here for a business that wants messaging conversations tied closely to sales stages. The record should make it clear whether someone is a new inquiry, waiting for a quote, ready for an appointment or no longer interested.
Its billing FAQ specifies at least a six-month subscription. Budget the commitment alongside migration and channel costs. A monthly equivalent can look attractive without being the short-term trial commitment a buyer expects.
Use a lead that does not buy immediately. After several exchanges, ask a colleague who did not participate to identify the customer’s request and next action. Then change the customer’s decision and inspect the follow-up. That is the practical benefit of a useful pipeline.
Tradeoff: a sales stage is not a replacement for every support report or conversation-routing rule. Preserve those requirements if they matter to your team. Kommo is most compelling when the missing information is the commercial next step; another shared inbox may be more appropriate when the central issue is service ownership.
Check the number and the history before changing providers
A move between conversation platforms has several separate parts: access to the number, channel connection, templates, customer records and conversation history. Ask what can be retained and what must be recreated. Do not disconnect a working business line before you understand the new setup.
For WhatsApp, confirm whether the connection supports the business app alongside the platform and what happens when a person replies. For ordinary phone calls and SMS, check the number’s supported capabilities separately. A WhatsApp connection is not proof of SMS activation.
Give the trial a clear finish line
Run one inquiry through qualification, booking and human handoff. Inspect the customer record and calendar, then reply again after the booking to see whether the system understands the changed situation. Count completed tasks and corrections, not just answered messages.
Start Carly through calls, SMS and WhatsApp setup or explore the WhatsApp CRM comparison.
Set up Carly for customer conversations
Choose the channels and calendar for one complete customer journey.
Help me connect Carly Teams so I can work with my organization's business texts, phone calls, voicemail and voice/text agents from this chat. I'll add it to you myself: tell me exactly what to click for the app you are, one step at a time, and wait for me to confirm before moving on. If a step doesn't match what I see, ask me what's on my screen. If you can do the setup yourself (Claude Code, Codex, Muse, Grok Bot), go ahead, and ask me for any key in your secure credential prompt, never in the chat. Don't tell me it's connected until list_phone_lines works, and if I have several teams, ask which to use. Before sending a text or making a call, confirm the team, recipient and message or task with me. The steps are below.
# Connect Carly Teams to an AI app
> Carly Teams works a team's business phone lines through the team's AI agents: business texts, phone calls, voicemail, the voice and text agents, and the team's CRM.
MCP server: https://carlyassistant.com/team/mcp (streamable HTTP, OAuth)
## Setup
Carly Teams isn't in any plugin or connector directory yet, so it's added as a custom connection by URL.
1. Add Carly Teams:
- ChatGPT: open https://chatgpt.com/plugins, click Add, and choose Create MCP App (not Create plugin or Upload plugin archive). If Create MCP App isn't on the menu, turn on Developer mode first in Settings > Security and login. Name it "Carly Teams" with the description "Work with my team's business texts, calls, voicemail and voice/text agents," paste https://carlyassistant.com/team/mcp as the server URL, choose OAuth, create it, and sign in. Then in the message box open the + menu, choose Developer mode, and pick Carly Teams. No plugin needs to be built, packaged or uploaded.
- Claude (claude.ai, Claude Desktop, or Cowork): Customize > Connectors > Add custom connector, name it Carly Teams, paste https://carlyassistant.com/team/mcp, and sign in.
- Claude Code: `claude mcp add --transport http --scope user carly-teams https://carlyassistant.com/team/mcp`, then /mcp, pick carly-teams, and authenticate.
- Codex: `codex mcp add carly-teams --url https://carlyassistant.com/team/mcp`, then `codex mcp login carly-teams`.
- Cursor: add {"mcpServers": {"carly-teams": {"url": "https://carlyassistant.com/team/mcp"}}} to ~/.cursor/mcp.json, then sign in to carly-teams from Customize.
- Muse: a custom connector to https://carlyassistant.com/team/mcp with a Carly API key as its bearer token. The key comes from carlyassistant.com/account (API key under Carly Teams) and goes in Muse's connector settings, not in a chat message.
- Grok: grok.com/connectors > New Connector > Custom, paste https://carlyassistant.com/team/mcp, and sign in.
- Grok Bot: a custom remote MCP server named carly-teams at https://carlyassistant.com/team/mcp. Approve it and sign in.
- Perplexity: Plugins in the sidebar (or Customize > Connectors), then Add custom > Connector > Add MCP connector. Choose Remote, name it Carly Teams, paste https://carlyassistant.com/team/mcp, pick OAuth, check the box and click Add, then click the Carly Teams card to sign in.
- Anything else: a remote MCP server (streamable HTTP) named carly-teams at https://carlyassistant.com/team/mcp. It signs in with OAuth.
Sign in with the Carly account that belongs to the organization.
2. Once it's added, the Carly Teams tools show up in the chat, including list_phone_lines. If they don't, turn Carly Teams on for the chat or start a new chat.
3. To check it worked, call list_phone_lines: it returns the teams and phone lines the account can reach. A team with no phone line yet can get one with find_numbers (optionally by area code) and get_number, which may return a checkout link to finish.
4. Something to try first: "Review our missed calls and voicemail and help me reply to customers." Carly Teams also reads and answers business texts, has the team's agent make calls, and edits the voice and text agents. Texts and calls go out at once from the agent's number and can't be taken back. Team permissions apply.
## Email, calendars and workflows
Email, calendars, files, booking pages and workflows are the regular Carly connector, added separately. It's listed in ChatGPT's plugin directory (https://chatgpt.com/plugins/plugin_asdk_app_6a67a26316b88191860222f918d4ec54) and Claude's connector directory (https://claude.ai/directory/carly), and connects anywhere else at https://carlyassistant.com/mcp/. Its setup is https://carlyassistant.com/mcp.txt.Want Carly answering your phones?
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