Kaspr vs Vapi.ai
Kaspr (Browser Extension) and Vapi.ai (Web SaaS) both compete in Conversational Voice Calling Agents. On pricing, Kaspr lists Free plan · $0/mo · Enterprise plan (free plan), whereas Vapi.ai lists From $0.05 usage-based (no free plan disclosed). Technically, Kaspr is rated L2 · Workflow copilot with a 3.6/5.0 (Proprietary moat) moat, while Vapi.ai is rated L3 · Conditional automation with a 4.0/5.0 (Proprietary moat) moat. Corporate profile: Kaspr (founded 2018, HQ Paris, Ile-de-France, France) vs. Vapi.ai (founded 2023, HQ San Francisco, California, $70.6M funding). Fact-checked by Anna Xia (Oct 15, 2026) for Kaspr and Anna Xia (Oct 7, 2026) for Vapi.ai. At a 5-seat team baseline, Kaspr starts at ~$59/mo vs Vapi.ai at Metered ($0.05).
Kaspr
B2B contact enrichment platform and Chrome extension providing direct European phone numbers and verified business emails from LinkedIn profiles.
5-Seat Floor: ~$59/mo (Free plan · $0/mo · Enterprise plan) · Autonomy: L2 · Workflow copilot · Moat: 3.6/5.0 (Proprietary moat)
Target fit: B2B SaaS, Creators / Solo (Browser Extension)
Vapi.ai
Voice AI developer platform orchestrating ultra-low-latency telephony, speech recognition, LLM reasoning, and neural voice synthesis via real-time APIs.
5-Seat Floor: Metered ($0.05) (From $0.05 usage-based) · Autonomy: L3 · Conditional automation · Moat: 4.0/5.0 (Proprietary moat)
Target fit: B2B SaaS, Marketing Agencies (Web SaaS)
How Kaspr and Vapi.ai differ
- Pricing model: Kaspr is freemium, Vapi.ai is usage-based.
- Kaspr has a free plan; none is recorded for Vapi.ai.
- Published tier ladder: Kaspr documents 3 priced tiers (Free / Sandbox $0, Entry / Starter $59/mo, Growth / Professional $99/mo); Vapi.ai documents 2 priced tiers (Entry / Starter $0.05/mo, Free $5/mo).
- AI autonomy: Vapi.ai is rated L3 · Conditional automation, Kaspr L2 · Workflow copilot on the MarTechRadar scale.
- Moat score: Vapi.ai scores 4.0/5.0 vs. Kaspr at 3.6/5.0 (Proprietary moat).
- Delivery: Kaspr is a Browser Extension product; Vapi.ai is a Web SaaS product.
- Kaspr was founded earlier (2018) than Vapi.ai (2023).
- Headquarters: Kaspr in Paris, Ile-de-France, France, Vapi.ai in San Francisco, California.
- Funding stage: Kaspr is Venture-backed; Vapi.ai is Series B.
- Company headcount: Kaspr is 11-50 employees; Vapi.ai is 51-200 employees.
- Audience: Kaspr targets Creators / Solo; Vapi.ai targets Marketing Agencies.
- Ecosystem stack: Kaspr connects with Salesforce, LinkedIn, Twilio Segment, Zapier; Vapi.ai connects with Slack, Twilio Segment.
Computed from the fields below. Only editor-verified ratings and vendor-sourced prices are compared.
When to choose Kaspr vs Vapi.ai (and when to walk away)
Choose Kaspr if
- Target ICP & Stack Fit: You operate as B2B SaaS and Creators / Solo requiring a Browser Extension deployment for AI Calling, with verified ecosystem connectivity for Salesforce, LinkedIn, Twilio Segment, Zapier.
- L2 Architecture & Defensibility: European B2B direct-dial coverage aligned with GDPR compliance frameworks, delivered via a frictionless lightweight browser extension.
- Commercial Model Fit: Your procurement budget aligns with Free plan · $0/mo · Enterprise plan and want a self-serve free tier for zero-cost initial validation.
Walk away from Kaspr if
- Walk away if your workflow requires uncapped enterprise volume on the Free plan · $0/mo · Enterprise plan entry plan without upgrading tiers.
- Walk away if your workflow cannot tolerate dom dependency: Third-party interface adjustments by LinkedIn can disrupt client-side DOM scraping elements, requiring regular patch deployments to restore overlay functionality.
- Walk away if credit burn risk is a deal-breaker for your team: Automated prospecting routines rapidly deplete fixed phone credit balances on unverified mobile lookups without prior validation of target line activity.
Choose Vapi.ai if
- Target ICP & Stack Fit: You operate as B2B SaaS and Marketing Agencies requiring a Web SaaS deployment for AI Calling, with verified ecosystem connectivity for Slack, Twilio Segment.
- L3 Architecture & Defensibility: Proprietary low-latency pipeline orchestration layer syncing WebSockets, SIP trunks, turn detection, and modular model swapping with minimal latency jitter.
- Commercial Model Fit: Your procurement budget aligns with From $0.05 usage-based.
Walk away from Vapi.ai if
- Walk away if your workflow requires uncapped enterprise volume on the From $0.05 usage-based entry plan without upgrading tiers.
- Walk away if your workflow cannot tolerate latency stacking: Compound latency across decoupled external transcribers, reasoning engines, and synthesis APIs creates occasional regional jitter exceeding conversational comfort thresholds.
- Walk away if carrier regulatory overhead is a deal-breaker for your team: Scaling outbound calling campaigns requires external carrier registration, 10DLC compliance verification, and manual STIR/SHAKEN attestation management.
Side-by-side facts
| Field | Kaspr | Vapi.ai |
|---|---|---|
| Subtrack | Conversational Voice Calling Agents | Conversational Voice Calling Agents |
| Pricing | Free plan · $0/mo · Enterprise plan | From $0.05 usage-based |
| Pricing model | Freemium | Usage-based |
| Published pricing tiers | Free / Sandbox ($0) · Entry / Starter ($59/mo) · Growth / Professional ($99/mo) · Enterprise / Custom (Custom quote) | Entry / Starter ($0.05/mo) · Free ($5/mo) |
| Free access | Free plan | No free plan disclosed |
| Enterprise plan | Yes | Not recorded |
| AI autonomy level | L2 · Workflow copilot | L3 · Conditional automation |
| Moat tier & score | 3.6 / 5.0 · Proprietary moat | 4.0 / 5.0 · Proprietary moat |
| Delivery | Browser Extension | Web SaaS |
| Audience | B2B SaaS, Creators / Solo | B2B SaaS, Marketing Agencies |
| Ecosystem integrations | Salesforce, LinkedIn, Twilio Segment, Zapier | Slack, Twilio Segment |
| Compliance & governance | GDPR | HIPAA |
| Funding & backing | Venture-backed | $70.6M · Backed by Peak XV, Bessemer Venture Partners |
| Founders | Allan Benguigui, Omar Ghorbel | John Dearsley, Nik Gupta |
| Company size | 11-50 employees | 51-200 employees |
| Founded | 2018 | 2023 |
| Headquarters | Paris, Ile-de-France, France | San Francisco, California |
| Fact-checked | Anna Xia, Oct 15, 2026 | Anna Xia, Oct 7, 2026 |
| Governance & docs | Terms ↗ · Privacy ↗ | API & Docs ↗ · Terms ↗ · Privacy ↗ |
Kaspr vs Vapi.ai: TCO & constraint stress test
Test how both tools behave under your team size, monthly budget ceiling, CRM ecosystem, and governance guardrails.
Kaspr
High Deal-Risk · Constraint Mismatch- Opaque Enterprise Quoting vs. SMB/Mid-Market Budget: Kaspr does not disclose a public self-serve floor (Free plan · $0/mo · Enterprise plan). Buyers with a $800/mo cap face high sales-qualification friction.
- Published Self-Serve Entry Floor: Kaspr publishes a transparent entry point (Free plan · $0/mo · Enterprise plan) with a free tier for initial validation before committing.
- Usage / Credit Burn Volatility: Kaspr uses credit or usage-metered billing (Free plan · $0/mo · Enterprise plan). High-volume automated workflows across 5 seats can trigger mid-cycle overage charges.
- Tier Fit for 5-Seat Scale: Entry / Starter ($59/mo): Verified $59/mo published rate on vendor pricing schedule.
Walk-Away Rule: Walk away if your workflow requires uncapped enterprise volume on the Free plan · $0/mo · Enterprise plan entry plan without upgrading tiers.
Negotiation Lever: Validate exact quota thresholds (seats, credits, or API calls) included in Kaspr's Free plan · $0/mo · Enterprise plan tier before converting from monthly to annual billing.
Vapi.ai
Conditional Fit · Contract & Stack Caveats- Published Self-Serve Entry Floor: Vapi.ai publishes a transparent entry point (From $0.05 usage-based) for initial validation before committing.
- Usage / Credit Burn Volatility: Vapi.ai uses credit or usage-metered billing (From $0.05 usage-based). High-volume automated workflows across 5 seats can trigger mid-cycle overage charges.
- Tier Fit for 5-Seat Scale: Entry / Starter ($0.05/mo): Models pass-through at cost
- Primary Operational Bottleneck: Latency Stacking: Compound latency across decoupled external transcribers, reasoning engines, and synthesis APIs creates occasional regional jitter exceeding conversational comfort thresholds.
Walk-Away Rule: Walk away if your workflow requires uncapped enterprise volume on the From $0.05 usage-based entry plan without upgrading tiers.
Negotiation Lever: Validate exact quota thresholds (seats, credits, or API calls) included in Vapi.ai's From $0.05 usage-based tier before converting from monthly to annual billing.
Limitations
Kaspr
Operational considerations and platform boundaries include: DOM Dependency: Third-party interface adjustments by LinkedIn can disrupt client-side DOM scraping elements, requiring regular patch deployments to restore overlay functionality.Full limitations in the Kaspr review
Vapi.ai
Operational considerations and platform boundaries include: Latency Stacking: Compound latency across decoupled external transcribers, reasoning engines, and synthesis APIs creates occasional regional jitter exceeding conversational comfort thresholds.Full limitations in the Vapi.ai review
Pricing notes & tier schedules
Kaspr: Free plan · $0/mo · Enterprise plan
Kaspr utilizes a credit-based subscription model. Sourcing teams can test data accuracy via an ongoing free tier configured at $0 per month, which supplies basic monthly allocations of email and phone credits.
- Free / Sandbox ($0, 1–2 seats (Evaluation)): Entry free tier with capped usage or feature quotas for initial workflow testing.
- Entry / Starter ($59/mo, 1–2 seats): Verified $59/mo published rate on vendor pricing schedule.
- Growth / Professional ($99/mo, 5 seats): Verified $99/mo published rate on vendor pricing schedule.
- Enterprise / Custom (Custom quote, 15–50+ seats (Enterprise SLA)): Sales-negotiated annual contract for custom volume, SSO/RBAC governance, and dedicated SLA.
- Per-Seat Linear Scaling: Kaspr prices licenses on a per-user/seat basis (Free plan · $0/mo · Enterprise plan); expanding from 2 to 15+ operators multiplies base recurring spend linearly.
- Credit & Usage Burn Multiplier: Automated workflows consume metered credits/usage quotas; multi-step enrichment, voice minutes, or high-frequency agent runs can trigger mid-cycle top-up packs.
Vapi.ai: From $0.05 usage-based
The platform relies on an infrastructure billing framework with charges calculated per minute of audio runtime.
- Entry / Starter ($0.05/mo, 1–2 seats): Models pass-through at cost
- Free ($5/mo, 5 seats): 1 included Vapi phone number
- Credit & Usage Burn Multiplier: Automated workflows consume metered credits/usage quotas; multi-step enrichment, voice minutes, or high-frequency agent runs can trigger mid-cycle top-up packs.
- Enterprise Governance & Add-On Gating: Advanced capabilities such as Single Sign-On (SSO), custom role permissions, or specialized analytics modules are gated behind upper tiers or paid add-ons.
Frequently asked questions: Kaspr vs Vapi.ai
How does Kaspr pricing compare to Vapi.ai in 2026?
Kaspr is listed at Free plan · $0/mo · Enterprise plan (freemium, free plan), whereas Vapi.ai is listed at From $0.05 usage-based (usage-based, no free plan disclosed).
How do Kaspr and Vapi.ai compare on AI autonomy and moat depth?
On the MarTechRadar L1–L5 scale, Kaspr is rated L2 · Workflow copilot with a Proprietary moat moat (3.6/5.0), while Vapi.ai is rated L3 · Conditional automation with a Proprietary moat moat (4.0/5.0).
Which teams are Kaspr and Vapi.ai built for?
Kaspr is a Browser Extension product in Conversational Voice Calling Agents designed for B2B SaaS, Creators / Solo. Vapi.ai is a Web SaaS product in Conversational Voice Calling Agents designed for B2B SaaS, Marketing Agencies.
What are the main limitations of Kaspr vs Vapi.ai?
For Kaspr: Operational considerations and platform boundaries include: DOM Dependency: Third-party interface adjustments by LinkedIn can disrupt client-side DOM scraping elements, requiring regular patch deployments to restore overlay functionality. For Vapi.ai: Operational considerations and platform boundaries include: Latency Stacking: Compound latency across decoupled external transcribers, reasoning engines, and synthesis APIs creates occasional regional jitter exceeding conversational comfort thresholds.
What are the hidden TCO drivers and contract negotiation levers for Kaspr vs Vapi.ai?
For Kaspr: Per-Seat Linear Scaling (Kaspr prices licenses on a per-user/seat basis (Free plan · $0/mo · Enterprise plan); expanding from 2 to 15+ operators multiplies base recurring spend linearly.) Negotiation lever: Validate exact quota thresholds (seats, credits, or API calls) included in Kaspr's Free plan · $0/mo · Enterprise plan tier before converting from monthly to annual billing. For Vapi.ai: Credit & Usage Burn Multiplier (Automated workflows consume metered credits/usage quotas; multi-step enrichment, voice minutes, or high-frequency agent runs can trigger mid-cycle top-up packs.) Negotiation lever: Validate exact quota thresholds (seats, credits, or API calls) included in Vapi.ai's From $0.05 usage-based tier before converting from monthly to annual billing.
Excerpts are quoted verbatim from each fact-checked review. Last updated Oct 15, 2026.