Six kinds of product get compared with CosVoice. Some are an assistant that can dial out. Some are a business line answered by AI. Some are tools for developers. Here is what each one does and what it costs, from their own pages, checked September 12, 2026.
| CosVoice Your assistant's own phone line | Catch Their assistant, makes calls for you | Pally Text-first assistant | AI receptionists Rosie, Goodcall, NextPhone, Smith.ai | Voice platforms Retell, Bland, Vapi, Synthflow | DIY agent phones Open-source and hobby tools for Claude or OpenClaw agents | |
|---|---|---|---|---|---|---|
| A phone number that belongs to your assistant | YesIn your area code, plus an email address | NoTheir assistant, no number of its own | PartlyOn the $100 tier | YesA business line | PartlyYou buy and wire the number | PartlyYou bring a Twilio number |
| Makes calls for you | YesRestaurants, vendors, appointments, callbacks | Yes | No | NoInbound only | YesIf you build it | PartlyBasic, if you build it |
| Answers when you can't | YesTakes real notes, not a message | NoYou cannot call Catch | PartlyTexts; calling is not shown | Yes | YesIf you build it | Partly |
| Replaces your voicemail (forward missed calls) | YesCarrier codes shown, filled in | No | No | PartlyFor a business line | No | No |
| Callbacks land on the same number | YesThe line that called is the line that answers | No | No | Partly | PartlyIf you build it | No |
| Written summary after every call, with transcript | YesEmailed, plus a morning brief | YesEmail recap | PartlyChat | YesLead notes | PartlyRaw transcripts via API | Partly |
| Works with the assistant you already use | YesGrok Bot, Claude, ChatGPT, Cursor: one URL, OAuth | NoIt is the assistant | NoIt is the assistant | No | PartlyThrough code | PartlyOne client each, usually |
| Waits on hold, then rings you | Yes | No | No | No | PartlyIf you build it | No |
| Your instructions by text from your own phone | YesTexts from your mobile are instructions for your Bot | PartlyEmail in | Yes | No | No | No |
| Says it is an AI when asked; never pays | YesBoth, always | PartlyDiscloses; can be asked to pay | Partly | PartlyVaries by vendor | PartlyYour prompt decides | PartlyYour prompt decides |
| Content encrypted per line; staff see usage, not calls | Yes | PartlyNot published | PartlyNot published | PartlyVaries | PartlyVaries | NoUsually plaintext on your box |
| Set up without code | YesAbout a minute | Yes | Yes | Yes | No | No |
| Price | $29 · $69 · $149 /mo, 60 · 200 · 600 min, $0.25/min after | $99/mo flat | Free · $25 · $100/mo (number on the $100 tier) | $49 to $300+/mo; Rosie $49 for 250 min, Goodcall $79, NextPhone $199Business phone lines answered by AI. | $0.05 to $0.22 per minute, plus your engineeringBuild-it-yourself tools for developers. | $5 to $30/mo, usually per-minute on topYou host and maintain them. |
Sources, all public: Catch pricing · Pally pricing · AI receptionist comparison (Goodcall, Rosie, Smith.ai) · NextPhone pricing · Retell, Bland, Synthflow per-minute rates. If a price or feature has changed, tell us and we will fix the table.
A number in your area code, a plan you pick, working from the first call. About a minute.
An AI receptionist answers a business line and screens callers. CosVoice is your own assistant's phone. It takes instructions from you, makes calls for you, handles the callbacks, and reports back. One line per Bot, not a call center.
Yes. Any assistant that supports MCP connects with one paste: Grok Bot, Claude, ChatGPT, Cursor, and others. Developers also get a REST API and signed webhooks.
On a call, no. It never gives out a card number or agrees to a charge, so a booking or appointment is the most it commits you to. Your plan's minutes are the only thing the line itself spends, and app orders (dinner, groceries) go through only after you confirm.
Starter is $29 a month with 60 minutes of calls. Plus is $69 with 200 minutes. Pro is $149 with 600 minutes. Extra minutes are $0.25 each. Every plan includes the number, the email address, the Grok Bot connection, and every integration.
Pick a number, save the contact, make the first call. About a minute.