ContactOut vs Seamless.ai

Both tools are listed under Conversational Voice Calling Agents, and both have been fact-checked by a named editor. This page lines up their structured data and quotes each review’s limitations and pricing notes; it does not pick a winner.

ContactOut

B2B contact intelligence platform providing verified direct phone numbers and personal email addresses for outbound sales and recruiting teams.

Pricing: Free plan · $0/mo · Enterprise plan · Autonomy: L2 · Workflow copilot · Moat: 3.6/5.0 (Proprietary moat)

Target fit: B2B SaaS, DTC / eCommerce, Enterprise Brands (Web SaaS)

Read the ContactOut review

Seamless.ai

Real-time B2B sales prospecting search engine delivering direct dials, email addresses, and automated CRM contact enrichment.

Pricing: Custom / enterprise pricing · Autonomy: L2 · Workflow copilot · Moat: 3.6/5.0 (Proprietary moat)

Target fit: B2B SaaS (Browser Extension)

Read the Seamless.ai review

How ContactOut and Seamless.ai differ

Pricing model: ContactOut is freemium, Seamless.ai is enterprise / quote.
ContactOut has a free plan; none is recorded for Seamless.ai.
Delivery: ContactOut is a Web SaaS product; Seamless.ai is a Browser Extension product.
Headquarters: ContactOut in San Francisco, California, United States, Seamless.ai in United States.

Computed from the fields below. Only editor-verified ratings and vendor-sourced prices are compared.

Side-by-side facts

Field	ContactOut	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
Free access	Free plan	No free plan disclosed
Enterprise plan	Yes	Yes
AI autonomy level	L2 · Workflow copilot	L2 · Workflow copilot
Moat tier	Proprietary moat	Proprietary moat
Delivery	Web SaaS	Browser Extension
Audience	B2B SaaS, DTC / eCommerce, Enterprise Brands	B2B SaaS
Headquarters	San Francisco, California, United States	United States
Fact-checked	Anna Xia, Oct 14, 2026	Anna Xia, Oct 15, 2026

AI Head-to-Head Procurement Simulator · Evidence-Locked Dossier

ContactOut vs Seamless.ai: TCO & constraint stress test

Test how both tools behave under your team size, monthly budget ceiling, CRM ecosystem, and governance guardrails.

1. Team / Seat Scale

2. Monthly Budget Ceiling

3. Primary Stack

4. Guardrail

Under a 5-seat / $800/mo profile, ContactOut carries lower procurement friction (Conditional Fit · Contract & Stack Caveats) than Seamless.ai (High Deal-Risk · Constraint Mismatch).

ContactOut

Conditional Fit · Contract & Stack Caveats

Estimated Floor (5 Seats · Enterprise / Custom)Custom Quote (Free plan · $0/mo · Enterprise plan)Vendor does not publish a self-serve USD floor on its pricing page; requires sales qualification.Sales-gated pricing vs. $800/mo cap (High quote risk)

Opaque Enterprise Quoting vs. SMB/Mid-Market Budget: ContactOut 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: ContactOut 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: Entry / Starter ($49/mo): 300 exports / month
Primary Operational Bottleneck: Single-Seat Isolation: Standard commercial tiers restrict usage to single-seat allocations per company, imposing governance overhead for larger sales teams coordinating shared enrichment budgets.

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 ContactOut's Free plan · $0/mo · Enterprise plan tier before converting from monthly to annual billing.

ContactOut Pricing ↗Full ContactOut Review →

Seamless.ai

High Deal-Risk · Constraint Mismatch

Estimated Floor (5 Seats · Enterprise / Custom)Custom Quote (Custom / enterprise pricing)Vendor does not publish a self-serve USD floor on its pricing page; requires sales qualification.Sales-gated pricing vs. $800/mo cap (High quote risk)

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.

Seamless.ai Pricing ↗Full Seamless.ai Review →

Interactive Head-to-Head Scenario Red-Teamer · Fact-Gate Verified

Limitations

ContactOut

Operational considerations and platform boundaries include: Platform Dependency: The client extension relies on DOM parsing across third-party social networks, introducing vulnerability to target site markup updates that can interrupt workflow scraping.

Full limitations in the ContactOut 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

ContactOut: Free plan · $0/mo · Enterprise plan

ContactOut packages its dataset across tiered subscriptions governed by search volumes and data attribute access. Entry-level usage begins on a free tier at $0 per month, which provisions five emails and phone numbers daily.

Pricing details in the ContactOut review

ContactOut pricing page

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.

Pricing details in the Seamless.ai review

Frequently asked questions: ContactOut vs Seamless.ai

How does ContactOut pricing compare to Seamless.ai in 2026?

ContactOut 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 ContactOut and Seamless.ai compare on AI autonomy and moat depth?

On the MarTechRadar L1–L5 scale, ContactOut is rated L2 · Workflow copilot with a Proprietary moat moat (3.6/5.0), while Seamless.ai is rated L2 · Workflow copilot with a Proprietary moat moat (3.6/5.0).

Which teams are ContactOut and Seamless.ai built for?

ContactOut is a Web SaaS product in Conversational Voice Calling Agents designed for B2B SaaS, DTC / eCommerce, Enterprise Brands. Seamless.ai is a Browser Extension product in Conversational Voice Calling Agents designed for B2B SaaS.

What are the main limitations of ContactOut vs Seamless.ai?

For ContactOut: Operational considerations and platform boundaries include: Platform Dependency: The client extension relies on DOM parsing across third-party social networks, introducing vulnerability to target site markup updates that can interrupt workflow scraping. 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.

Excerpts are quoted verbatim from each fact-checked review. Last updated Oct 15, 2026.