Side by side
Microsoft Bot Framework vs Voiceflow
Both stand on chatbot builders. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan AndroidAPIiPhone+5
The Bot Framework may suit developers maintaining bots that need its SDK, channel connections, and hosting flexibility. For new agent development, Microsoft recommends the Microsoft 365 Agents SDK; teams relying on support tickets should also account for the stated end of Bot Framework SDK ticket service.
Visit Microsoft Bot Framework
Free plan AndroidAPIiPhone+2
Voiceflow covers agent creation through deployment and monitoring, with multiple channels and integration options. Agencies and partners have a free-trial route, while business buyers need to request pricing.
Visit VoiceflowThe facts
| Microsoft Bot Framework | Voiceflow | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | No |
| Runs on | Android, API, iPhone, Linux, Mac, Self-hosted, Web, Windows | Android, API, iPhone, Self-hosted, Web |
| Lowest paid plan | Free or on request | Business: $500 a month |
| Plans published | 2 | 6 |
| Maker | Not published | Voiceflow |
| Website | dev.botframework.com | voiceflow.com |
| On chatbot builders | #15 of 258 | #5 of 258 |
Microsoft Bot Framework: what it does well
- Includes tools and templates for speech, natural language, and Q&A bots.
- Provides client libraries for C#, JavaScript, Python, and Java.
- Connects bots to Teams, Facebook, Slack, and other channels.
- Allows hosting on own servers, Azure, or another data center.
- Free plan includes unlimited standard-channel messages.
What to know first
- Microsoft says the SDK is no longer updated or maintained.
- Microsoft recommends a different SDK for new agent development.
- Free plan limits premium-channel messages to 10,000 per month.
- Channel adapters may be needed for some channels or features.
Voiceflow: what it does well
- Agents can reach users by chat, phone, and SMS.
- Teams can review transcripts and call recordings.
- Connects to APIs, custom Functions, and MCP servers.
- Agencies and partners have a free-trial plan.
- Lists SOC 2 Type II and ISO/IEC 27001:2022.
What to know first
- Business pricing is available only on request.
- The agencies and partners plan uses usage-based billing.
- No maker headquarters location is stated.
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