Fathom Video vs Seamless.ai
Fathom Video (Web SaaS) and Seamless.ai (Browser Extension) both compete in Conversational Voice Calling Agents. On pricing, Fathom Video lists Free plan · $0/mo · Enterprise plan (free plan), whereas Seamless.ai lists Custom / enterprise pricing (no free plan disclosed). Technically, Fathom Video is rated L2 · Workflow copilot with a 4.2/5.0 (Proprietary moat) moat, while Seamless.ai is rated L2 · Workflow copilot with a 3.6/5.0 (Proprietary moat) moat. Corporate profile: Fathom Video (founded 2020, HQ San Francisco, CA, $23.8M funding) vs. Seamless.ai (HQ United States). Fact-checked by Anna Xia (Oct 14, 2026) for Fathom Video and Anna Xia (Oct 15, 2026) for Seamless.ai. At a 5-seat team baseline, Fathom Video starts at ~$16/mo vs Seamless.ai at Custom quote.
Fathom Video
AI-powered meeting recording, transcription, and summarization software that extracts action items and syncs notes to CRMs directly from video conferences.
5-Seat Floor: ~$16/mo (Free plan · $0/mo · Enterprise plan) · Autonomy: L2 · Workflow copilot · Moat: 4.2/5.0 (Proprietary moat)
Target fit: B2B SaaS (Web SaaS)
Seamless.ai
Real-time B2B sales prospecting search engine delivering direct dials, email addresses, and automated CRM contact enrichment.
5-Seat Floor: Custom quote (Custom / enterprise pricing) · Autonomy: L2 · Workflow copilot · Moat: 3.6/5.0 (Proprietary moat)
Target fit: B2B SaaS (Browser Extension)
How Fathom Video and Seamless.ai differ
- Pricing model: Fathom Video is freemium, Seamless.ai is enterprise / quote.
- Fathom Video has a free plan; none is recorded for Seamless.ai.
- Moat score: Fathom Video scores 4.2/5.0 vs. Seamless.ai at 3.6/5.0 (Proprietary moat).
- Delivery: Fathom Video is a Web SaaS product; Seamless.ai is a Browser Extension product.
- Headquarters: Fathom Video in San Francisco, CA, Seamless.ai in United States.
- Funding stage: Fathom Video is Acquired; Seamless.ai is Venture-backed.
- Ecosystem stack: Fathom Video connects with Salesforce, HubSpot, Slack, Microsoft Teams; Seamless.ai connects with HubSpot, Pipedrive, Twilio Segment.
Computed from the fields below. Only editor-verified ratings and vendor-sourced prices are compared.
When to choose Fathom Video vs Seamless.ai (and when to walk away)
Choose Fathom Video if
- Target ICP & Stack Fit: You operate as B2B SaaS requiring a Web SaaS deployment for AI Calling, with verified ecosystem connectivity for Salesforce, HubSpot, Slack, Microsoft Teams.
- L2 Architecture & Defensibility: Native meeting client integrations, bot-free desktop capture mechanisms, and high distribution velocity accelerated by acquisition by Superhuman.
- 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 Fathom Video 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 conference platform constraints: Third-party platform API changes or host-side bot admission denials can disrupt automated capture pipelines during customer calls.
- Walk away if acoustic overlap degeneracy is a deal-breaker for your team: Simultaneous speaker crosstalk and low-fidelity participant microphones degrade diarization accuracy and skew assigned action items.
Choose Seamless.ai if
- Target ICP & Stack Fit: You operate as B2B SaaS requiring a Browser Extension deployment for AI Calling, with verified ecosystem connectivity for HubSpot, Pipedrive, Twilio Segment.
- L2 Architecture & Defensibility: Live crawl validation heuristics that aggregate contact records dynamically on demand rather than relying exclusively on pre-indexed static datasets.
- Commercial Model Fit: Your procurement budget aligns with Custom / enterprise pricing.
Walk away from Seamless.ai if
- Walk away if you require transparent self-serve monthly billing or your budget ceiling is under $1,000/mo (Seamless.ai requires sales-gated custom quoting).
- Walk away if your workflow cannot tolerate live scraping latency and browser dom fragility: Real-time verification queries introduce noticeable latency during batch enrichment, and updates to host platform DOM trees frequently cause browser extension capture failures.
- Walk away if direct dial verification variance is a deal-breaker for your team: Heuristic mobile phone resolution exhibits intermittent precision degradation, occasionally returning corporate switchboards or obsolete extensions requiring manual SDR triage.
Side-by-side facts
| Field | Fathom Video | Seamless.ai |
|---|---|---|
| Subtrack | Conversational Voice Calling Agents | Conversational Voice Calling Agents |
| Pricing | Free plan · $0/mo · Enterprise plan | Custom / enterprise pricing |
| Pricing model | Freemium | Enterprise / quote |
| Published pricing tiers | Free / Sandbox ($0) · Free ($15/mo) · Growth / Professional ($16/mo) · Teams ($25/mo) | Enterprise / Custom (Custom quote) |
| Free access | Free plan | No free plan disclosed |
| Enterprise plan | Yes | Yes |
| AI autonomy level | L2 · Workflow copilot | L2 · Workflow copilot |
| Moat tier & score | 4.2 / 5.0 · Proprietary moat | 3.6 / 5.0 · Proprietary moat |
| Delivery | Web SaaS | Browser Extension |
| Audience | B2B SaaS | B2B SaaS |
| Ecosystem integrations | Salesforce, HubSpot, Slack, Microsoft Teams, Zoom, Twilio Segment | HubSpot, Pipedrive, Twilio Segment |
| Compliance & governance | SOC 2, GDPR, HIPAA | SOC 2, GDPR, ISO 27001 |
| Funding & backing | $23.8M · Acquired by Superhuman | Venture-backed |
| Founders | Richard White | — |
| Company size | 51-200 employees | — |
| Founded | 2020 | 2015 |
| Headquarters | San Francisco, CA | United States |
| Fact-checked | Anna Xia, Oct 14, 2026 | Anna Xia, Oct 15, 2026 |
| Governance & docs | Trust & Security ↗ · System Status ↗ · API & Docs ↗ · Changelog ↗ · Terms ↗ · Privacy ↗ | Changelog ↗ · Terms ↗ · Privacy ↗ |
Fathom Video vs Seamless.ai: TCO & constraint stress test
Test how both tools behave under your team size, monthly budget ceiling, CRM ecosystem, and governance guardrails.
Fathom Video
Conditional Fit · Contract & Stack Caveats- Opaque Enterprise Quoting vs. SMB/Mid-Market Budget: Fathom Video 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: Fathom Video publishes a transparent entry point (Free plan · $0/mo · Enterprise plan) with a free tier for initial validation before committing.
- Tier Fit for 5-Seat Scale: Free ($15/mo): Verified $15/mo tier from vendor pricing schedule.
- Primary Operational Bottleneck: Conference Platform Constraints: Third-party platform API changes or host-side bot admission denials can disrupt automated capture pipelines during customer calls.
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 Fathom Video's Free plan · $0/mo · Enterprise plan tier before converting from monthly to annual billing.
Seamless.ai
High Deal-Risk · Constraint Mismatch- Opaque Enterprise Quoting vs. SMB/Mid-Market Budget: Seamless.ai does not disclose a public self-serve floor (Custom / enterprise pricing). Buyers with a $800/mo cap face high sales-qualification friction.
- Sales-Gated Contract Terms: Seamless.ai provides custom enterprise licensing structured around seat counts, bulk credit allocations, and data add-ons such as buyer intent and automated enrichment modules.
- Primary Operational Bottleneck: Live Scraping Latency and Browser DOM Fragility: Real-time verification queries introduce noticeable latency during batch enrichment, and updates to host platform DOM trees frequently cause browser extension capture failures.
Walk-Away Rule: Walk away if you require transparent self-serve monthly billing or your budget ceiling is under $1,000/mo (Seamless.ai requires sales-gated custom quoting).
Negotiation Lever: Demand a 30- to 60-day paid pilot opt-out clause in the Seamless.ai order form before signing a 12-month enterprise commitment.
Limitations
Fathom Video
Operational considerations and platform boundaries include: Conference Platform Constraints: Third-party platform API changes or host-side bot admission denials can disrupt automated capture pipelines during customer calls.Full limitations in the Fathom Video review
Seamless.ai
Operational considerations and platform boundaries include: Live Scraping Latency and Browser DOM Fragility: Real-time verification queries introduce noticeable latency during batch enrichment, and updates to host platform DOM trees frequently cause browser extension capture failures.Full limitations in the Seamless.ai review
Pricing notes & tier schedules
Fathom Video: Free plan · $0/mo · Enterprise plan
Fathom employs a product-led freemium licensing structure centered on an individual entry plan priced at $0 per user. This baseline tier provides unlimited call recording and automated summaries for individual contributors.
- Free / Sandbox ($0, 1–2 seats (Evaluation)): Entry free tier with capped usage or feature quotas for initial workflow testing.
- Free ($15/mo, 1–2 seats): Verified $15/mo tier from vendor pricing schedule.
- Growth / Professional ($16/mo, 5 seats): Everything from Free
- Teams ($25/mo, 15 seats): Verified $25/mo tier from vendor pricing schedule.
- Per-Seat Linear Scaling: Fathom Video 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.
- Annual Billing Headline vs. Monthly Premium: Headline entry rates reflect annual billing commitments (save 25%); month-to-month flexibility carries a higher effective monthly rate or requires annual prepayment.
Seamless.ai: Custom / enterprise pricing
Seamless.ai provides custom enterprise licensing structured around seat counts, bulk credit allocations, and data add-ons such as buyer intent and automated enrichment modules. Commercial pricing is available on request through tailored enterprise sales quotes based on organizational scale and seats.
- Enterprise / Custom (Custom quote, Unlimited seats (Enterprise SLA)): Sales-negotiated annual contract for custom volume, SSO/RBAC governance, and dedicated SLA.
- 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: Fathom Video vs Seamless.ai
How does Fathom Video pricing compare to Seamless.ai in 2026?
Fathom Video is listed at Free plan · $0/mo · Enterprise plan (freemium, free plan), whereas Seamless.ai is listed at Custom / enterprise pricing (enterprise / quote, no free plan disclosed).
How do Fathom Video and Seamless.ai compare on AI autonomy and moat depth?
On the MarTechRadar L1–L5 scale, Fathom Video is rated L2 · Workflow copilot with a Proprietary moat moat (4.2/5.0), while Seamless.ai is rated L2 · Workflow copilot with a Proprietary moat moat (3.6/5.0).
Which teams are Fathom Video and Seamless.ai built for?
Fathom Video is a Web SaaS product in Conversational Voice Calling Agents designed for B2B SaaS. Seamless.ai is a Browser Extension product in Conversational Voice Calling Agents designed for B2B SaaS.
What are the main limitations of Fathom Video vs Seamless.ai?
For Fathom Video: Operational considerations and platform boundaries include: Conference Platform Constraints: Third-party platform API changes or host-side bot admission denials can disrupt automated capture pipelines during customer calls. For Seamless.ai: Operational considerations and platform boundaries include: Live Scraping Latency and Browser DOM Fragility: Real-time verification queries introduce noticeable latency during batch enrichment, and updates to host platform DOM trees frequently cause browser extension capture failures.
What are the hidden TCO drivers and contract negotiation levers for Fathom Video vs Seamless.ai?
For Fathom Video: Per-Seat Linear Scaling (Fathom Video 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 Fathom Video's Free plan · $0/mo · Enterprise plan tier before converting from monthly to annual billing. For Seamless.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: Demand a 30- to 60-day paid pilot opt-out clause in the Seamless.ai order form before signing a 12-month enterprise commitment.
Excerpts are quoted verbatim from each fact-checked review. Last updated Oct 15, 2026.