CallFast vs RFP.ai: Which is better?

CallFast is an AI-driven application designed to quickly contact leads and schedule appointments on behalf of users. It integrates with various calendar and CRM tools, allowing users to send leads from multiple sources, and the AI assistant handles the calls to secure appointments while the leads are still engaged. Users can try the service with a $20 free credit and are charged based on the duration of connected calls.

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RFP.ai

RFP.ai is a trust-first platform that turns an uploaded RFP or security questionnaire into cited, review-ready answers in hours instead of weeks. It extracts the questions, generates source-backed drafts from your own approved content with confidence scores, and routes uncertain answers to the right reviewer. Every answer carries citations, nothing is trained on your data, and the platform is EU-hosted.

View RFP.ai

Key features

CallFast

AI assistant calls leads within seconds to book appointments.
Syncs data with calendars, CRMs, and other tools.
Allows users to send leads from various form providers.
Offers multiple voice options for the AI assistant.
Provides a $20 free credit for new users to try the service.

RFP.ai

Uploaded RFP to cited answers in hours
Confidence scoring (0-100) flags answers needing review
Source-backed drafts from your own approved content
Browser extension for portals plus Claude Desktop (MCP) integration
EU-hosted, with no training on your data

Useful for

CallFast

Rapid Lead Engagement: The application allows for immediate calling of leads within seconds, ensuring that potential clients are contacted while their interest is still high.
Appointment Scheduling: It facilitates the booking of appointments directly through the AI assistant, streamlining the process and reducing the time spent on manual scheduling.
Integration with Tools: The application syncs with various calendars, CRMs, and other tools, enhancing workflow efficiency and data management.
High Conversion Potential: By addressing the issue of leads going cold, it aims to improve lead conversion rates significantly beyond the average of 2.9%.
User-Friendly Experience: The AI assistant can answer questions and provide a positive interaction, reflecting well on the business and improving customer satisfaction.

RFP.ai

Proposal and presales teams answering RFPs
Security and compliance teams handling questionnaires
Organizations with repeat response work
Teams needing audit trails and buyer trust

Use cases

CallFast

AI assistant calls leads within seconds to book appointments, improving lead conversion rates.
Syncs appointment data with calendars, CRMs, and other tools for seamless integration.
Accepts leads from various sources and form providers, making it versatile for different businesses.
Offers customizable voice options for the AI assistant to enhance the caller experience.
Provides a pay-as-you-go pricing model with a trial option using $20 free credit.

RFP.ai

Respond to RFPs and security questionnaires fast
Auto-fill vendor portals like SAP Ariba
Route low-confidence answers to expert reviewers
Reuse approved knowledge across proposals

Price

CallFast

One plan available: Pay-as-you-go.
Cost: $0.60 per minute of connected call.
Average booked call length: 1 minute and 32 seconds (approximately $0.92 for a confirmed appointment).
$20 free credit available for new accounts.
Billed monthly based on usage.

RFP.ai

7-day free trial on every plan
Starter — €49/mo (1M tokens, 5 users)
Professional — €129/mo (5M tokens, 15 users)
Enterprise — €449/mo (20M tokens, unlimited users, SSO)