Short answer: Synthflow builds AI voice agents for large organisations, such as contact centres, healthcare and insurance, and sells them on annual enterprise agreements with no free plan. OsmO is for individuals and small teams who want ChatGPT, Claude or another AI app to call a business, starting free. They are not really competing for the same buyer.
On 13 November 2026 Synthflow's pricing page said every deployment starts on an enterprise contract, with no free plan or trial.
Synthflow agents answer and make calls inside a company's own phone system and CRM.
OsmO starts with 50 free credits and no contract.
OsmO runs from the AI app you already use; there is no deployment.
How it works
- Sign in with your mobile numberYou get 50 free credits. Nothing to pay.
- Add OsmO to ChatGPTChatGPT, Claude, Grok and other apps that take connectors.
- Ask it to callOsmO calls, talks, and tells you what was said.
The full guide
Who each one is for
Synthflow's site describes an enterprise platform whose agents work inside a company's existing phone system: they resolve routine requests, book appointments, route calls, update CRMs such as Salesforce and HubSpot, and hand over to a person with a transcript. It lists contact centres, multi-location retail, healthcare, insurance and financial services, and compliance such as SOC 2 Type II, ISO 27001, PCI DSS and HIPAA with a BAA.
OsmO For my AI serves the person on the other side of the phone: someone who wants their AI app to call a shop, clinic or helpline and bring back the answer.
| Synthflow | OsmO For my AI | |
|---|---|---|
| Buyer | Enterprises | Individuals and small teams |
| Contract | Annual enterprise agreement | None |
| Free to try | No free plan or trial | 50 free credits, no card |
| Per-minute rate | None published | Not per minute: 3 credits per answered call |
| Runs in | Your phone system and CRM | ChatGPT, Claude, Grok and other connector apps |
| Data region | US or EU workspace, chosen at setup | Not applicable |
When Synthflow is the better choice
If your organisation wants AI to answer or place a large share of its own customer calls, plugged into the phone and CRM systems it already runs, Synthflow is built for that, with launch support and a scoped contract.
When OsmO is the better choice
If you are one person, or a small office, and the job is a handful of calls to other businesses, an enterprise contract is the wrong size. With OsmO you can make your first call a few minutes after signing in.
- Add OsmO to your AI app from its connector or plugin settings.
- Sign in with your mobile number; you get 50 free credits.
- Ask for the call, with the business and your question.
- OsmO calls, works the menu and waits on hold, then reports back.
What it costs
OsmO For my AI starts with 50 free credits when you sign in with your mobile number, with no card. An answered call uses 3 credits however long it lasts, and a call nobody answers is free, so the free credits cover about 16 answered calls. When they run out you can keep calling from the OsmO app.
The bottom line
Synthflow and OsmO meet at the phone line from opposite ends. Synthflow is what a large company might deploy so that its own customers reach an AI agent when they call. OsmO is what a customer might use to call a company without waiting in the queue. If your business is shopping for enterprise voice AI, compare Synthflow with other enterprise platforms on integrations, compliance and support. If you simply need calls made for you, start with OsmO's free credits and see whether it covers what you need.
Where OsmO works
You can sign in with a mobile number from the United States, Canada, the United Kingdom or Australia (India too), and calls are placed from the OsmO number for your country. OsmO calls listed businesses in your own country, such as shops, clinics, restaurants and offices, and toll-free helplines. With the free web credits it does not call personal numbers; with the OsmO app it can also call your saved contacts.
Questions people ask
Does Synthflow have a free trial?
Its pricing page said no on 13 November 2026: there is no free plan or trial, and deployments start on an enterprise contract.
Sources
Checked November 13, 2026. Vendors change their products often; follow the links for the current version.
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