S
SVapi vs Writer.com
Pricing, features, platforms and who each one suits — side by side.
V
Choose Vapi if…
- you want a free plan to start with
- you need an API to build on
- you're in its core audience: developers, customer support teams
W
Choose Writer.com if…
- you work on Slack
- you're in its core audience: enterprise marketing teams, sales teams
Side by side
Feature Vapi Writer.com
Pricing modelFreemiumFree trial
Starting price$29/mo—
Free plan
Free trial
API
Open source
Trains AI on your contentYesNo
Data retentionDepends on customer config; free plan 14 days raw data; deleted on requestZero data retention; stored only as long as needed; configurable deletion schedule
Security and complianceSOC 2, HIPAA, PCI DSSSOC 2 Type II, ISO 27001, ISO 27701, ISO 42001, GDPR, HIPAA, PCI DSS
Model choice—
Human approval step—
Custom agent builder
SSO & audit logs—
PlatformsWeb, APIWeb, Slack
CategoryAI AgentsAI Agents
CompanyVapi Inc.WRITER Inc.
Based inUnited StatesUnited States
Founded—2020
Part of——
Key features
V Vapi
- Configurable voice, conversation flow and telephony
- Call testing and simulation before going live
- Real-time call monitoring and observability
- Built-in AI conversation guardrails
- Twilio, Vonage, Telnyx and Vapi SIP telephony
- Model providers passed through at cost
- SSO, OAuth and RBAC access controls
- SOC 2, HIPAA and PCI compliance
W Writer.com
- WRITER Agent for shared team workflows
- Reusable Playbooks and domain Skills
- Connectors that act in existing business tools
- Enterprise Brain grounding in brand and product knowledge
- AI Studio adoption analytics and usage management
- Audit logs with SIEM export
- BYOK encryption and data loss prevention guardrails
- Rate limits, consumption tracking and spend alerts
Plans and prices
From each vendor's site. Prices change — confirm before buying.
Vapi
No Success Package$0 to start, $0.05/min hosting
Core$29
Pro10% of Vapi hosting fee, $999/mo minimum
PremierCustom
Writer.com
StarterNot published
EnterpriseCustom
Strengths and limitations
Vapi
- $5 free credits and no minimum minutes to start
- Model provider costs passed through with no markup
- Unlimited agents on every plan
- SOC 2, HIPAA and PCI compliance
- The hosting fee and provider costs add up; the page estimates $82–$129 for 1,000 minutes
- HIPAA compliance is a $2,000/month add-on
- The free tier has no support SLA and allows only 4 concurrent calls
- Pro requires a $999/month minimum
Writer.com
- 14-day free trial without a credit card
- Says it never retains or trains on customer data
- Detailed governance: audit logs, BYOK, DLP, spend alerts
- 20% discount for nonprofits and education
- Starter plan price is not published
- Starter is limited to 5 users and 5 Playbooks
- Pays by card only; no ACH, invoicing or PayPal
- Enterprise pricing requires contacting sales
More comparisons
Other options to consider
SS
From $79/mo
I
IAI customer agent that resolves support, sales and ecommerce conversations
From $49.50/mo
I
From $49.50/mo
I
AI customer agent that resolves support, sales and ecommerce conversations
Customer SupportAPI
Z
ZZ
Free trial
F
FHelpdesk ticketing with AI agents and agent copilot for customer service teams
From $19/mo
F
From $19/mo
F
Helpdesk ticketing with AI agents and agent copilot for customer service teams
Customer Support
T
TT
From $24.17/mo
T
AI customer service and live chat that answers questions and drives store sales
Customer SupportAPI
G
GG
From $10/mo
Built from each vendor's public website; we haven't tested them hands-on. Editorial policy