Seamless.AI vs Apollo (2026)
Seamless.AI and Apollo both combine a B2B contact database with outreach tooling and automation, but they are built around different commercial models. Seamless.AI leads with a 1.8B+ real-time verified contact claim and gates its paid tiers behind a sales conversation. Apollo publishes four self-serve pricing tiers, bundles sequences, a dialer, and email warmup into the same credit pool, and lets teams start free. The platform architectures overlap significantly, but the buying experience and true cost structure diverge in ways that matter before you sign anything.
Apollo wins for teams that need transparent, self-serve pricing with built-in sequences, warmup, and a dialer bundled into published plans. Seamless.AI wins for teams that prioritize a larger real-time verified contact database and are comfortable with a sales-led procurement process for paid access. Apollo's credit model is fully documented: emails cost 1 credit, phones cost 8, and dialer usage costs 2 credits per minute. Seamless.AI's free tier gives 1,000 credits per year, but Pro and Enterprise credit volumes and prices require a sales call to determine. The add-on architecture on Seamless.AI, where AI Assistant, Autopilot, Buyer Intent, and API each carry separate costs, compounds the total price in ways that are difficult to model before engaging the vendor. For any team that needs to evaluate cost before committing, Apollo is the only viable self-serve option between the two.
Fast Answer
Seamless.AI vs Apollo: who wins for what
Side-by-Side
Seamless.AI vs Apollo: key differences
| Seamless.AI | Apollo | |
|---|---|---|
| Best for | Teams prioritizing database size and real-time mobile coverage | Teams needing self-serve pricing with sequences, warmup, and dialer bundled |
| Database claim | 1.8B+ verified emails · 414M+ mobile numbers (real-time) | B2B contact and company database (Apollo Data) |
| Free plan | ✓ (1 user · 1,000 credits/yr granted monthly) | ✓ (900 credits/mo · 2 sequences/team · 1 mailbox) |
| Published paid pricing | ✗ (Pro and Enterprise require sales contact) | ✓ ($49 / $79 / $119 per user/mo annual) |
| Built-in email sequences | Via Connect (Engagement Hub) | ✓ (unlimited on all paid plans) |
| Email warmup included | ✗ (not confirmed in plan documentation) | ✓ (Basic plan and above) |
| Built-in dialer | Via Connect (Engagement Hub) | ✓ (credit-based US dialer · 2 credits/min) |
| Buyer intent signals | Available as add-on | Tiered intent filters on paid plans |
| Autopilot / automation | Available as add-on | Automated workflows (Professional and above) |
| API access | Available as add-on | ✓ (enrichment API on paid tiers) |
| CRM enrichment | ✓ (Salesforce, HubSpot, MS Dynamics, Pipedrive, Salesloft, Outreach) | ✓ (CSV, CRM, and API enrichment on all paid tiers) |
| Compliance | GDPR · CCPA · SOC 2 Type II · ISO 27001 | SOC 2 · ISO 27001 · GDPR · CCPA · CASA Tier 2 · PCI DSS · EU-US DPF |
| Users | Not confirmed | 500,000+ companies |
Apollo pricing reflects annual billing. Monthly billing prices are not publicly confirmed for paid plans. Seamless.AI Pro and Enterprise pricing are fully sales-led with no public amounts. Verify current pricing at each platform before committing. Seamless.AI add-on costs for Autopilot, Buyer Intent, API, and AI Assistant are not published and must be scoped separately in a vendor conversation.
Feature Comparison
Where Seamless.AI and Apollo diverge in practice
Pricing transparency and self-serve access: Apollo publishes four tiers with credit volumes, seat requirements, and key feature gates clearly documented. A team can open Apollo's pricing page, model their credit consumption against email, phone, and dialer usage, and sign up without speaking to anyone. Seamless.AI's free plan provides 1,000 credits per year, but moving beyond that to Pro or Enterprise requires a sales call where credit volumes and costs are negotiated rather than selected from a published table.
In Apollo, email lookups cost 1 credit, phone lookups cost 8 credits, enrichment costs 1 to 8 credits per record, and US Dialer usage costs 2 credits per minute. Teams can calculate their expected monthly credit burn before choosing a plan. Seamless.AI does not publish equivalent credit cost breakdowns for Pro and Enterprise tiers.
Add-on architecture and total cost: Seamless.AI's advanced capabilities are shown as add-ons in the pricing grid. Buyer Intent Data, Autopilot, Data Enrichment, AI Assistant, and API access each carry separate costs on top of the base plan. Apollo bundles comparable capabilities into its published plan tiers: automated workflows are included at Professional, intent filters are included at paid tiers, and the enrichment API is part of the platform rather than a separate line item. The practical difference is that Apollo's total cost is visible before any conversation, while Seamless.AI's total cost requires scoping each add-on individually with the sales team.
Outreach execution and deliverability tooling: Apollo includes unlimited email sequences on all paid plans, a deliverability suite with email warmup starting at the Basic tier, and a US dialer with A/Z testing on Professional and above. Seamless.AI's Engagement Hub (Connect) covers email, calling, social selling, and tasks, but email warmup is not confirmed as a built-in capability in the platform's documented feature set. Teams that treat inbox placement as a first-class priority alongside data quality will find Apollo's integrated warmup and deliverability controls more immediately usable.
Seamless.AI claims 1.8B+ verified business emails and 414M+ mobile numbers with real-time verification applied continuously. These figures are larger than Apollo's stated database. Data quality claims from both tools should be tested against your specific ICP geography and seniority levels before committing. Raw size does not determine usable coverage for any specific target list.
Pricing Reality
What each platform actually costs to run
Apollo pricing: The free plan provides 900 credits per month with 2 active sequences and 1 mailbox. The Basic plan at $49/mo (annual) gives 30,000 credits upfront, unlimited sequences, the deliverability suite with warmup, and 1,000 record selections. Professional at $79/mo adds A/Z testing, automated workflows, and 4,000 monthly calling minutes. The Organization plan at $119/mo requires a minimum of 3 users and adds SSO, advanced security, and 8,000 calling minutes per month. Monthly billing prices for paid plans are not confirmed.
Seamless.AI pricing: The free plan provides 1 user with 1,000 credits per year, granted in monthly increments. Pro pricing requires contacting sales: confirmed capabilities include daily credit refresh, unlimited emails, phones, and exports on a per-user model. Enterprise is also contact-sales with unlimited users and unlimited credits. Buyer Intent Data, Autopilot, AI Assistant, Data Enrichment, and API access are each shown as add-ons in the pricing grid, meaning none of these are included in the base plan cost at any tier without a separate purchase.
Before signing a Seamless.AI contract, scope every add-on separately: Buyer Intent, Autopilot, AI Assistant, Data Enrichment, and API each carry additional costs that are not published. Teams that need all five capabilities should request a fully-loaded quote that includes the base plan plus every required add-on before comparing against Apollo's all-in published tier pricing.
At the free plan level, Apollo provides more practical outreach capability: 2 active sequences and 250 emails per day versus Seamless.AI's 1,000 credits granted across the year with no confirmed sequence functionality at the free tier. For paid tiers, Apollo's self-serve structure makes it the only platform in this comparison where a team can model total annual cost without a vendor conversation.
Strengths & Tradeoffs
What each platform does and doesn't do well
Seamless.AI
Strengths
1.8B+ verified business emails and 414M+ mobile numbers updated in real time represent a larger claimed database than most competing platforms, giving teams a broader starting pool for contact discovery
Pitch Intelligence feature provides context on what is happening inside target accounts, surfacing talking points that help reps personalize cold outreach beyond basic firmographic data
Full compliance stack including GDPR, CCPA, SOC 2 Type II, and ISO 27001 covers the enterprise security review requirements that procurement teams check before approving a new vendor
6,000+ tool integration claim via API covers the breadth of GTM stack connections that large revenue teams need to connect data into their existing infrastructure
Tradeoffs
Pro and Enterprise pricing are fully sales-led with no public amounts, making it impossible to model total cost before engaging a vendor and slowing procurement for teams with internal budget approval gates
Key capabilities including Buyer Intent Data, Autopilot, AI Assistant, Data Enrichment, and API access are add-ons that each carry separate costs, making true total cost significantly higher than any base plan quote suggests
Email warmup is not confirmed as a built-in deliverability feature, requiring teams to source inbox warming from a separate tool on top of the Seamless.AI contract
Apollo
Strengths
Fully transparent self-serve pricing with four published tiers lets teams model cost, validate data quality on the free plan, and upgrade or cancel without a sales process
Email sequences, deliverability suite, warmup, and CRM enrichment are all bundled into Basic ($49/mo) and above, eliminating separate tool subscriptions for warmup and sequencing at the entry paid tier
Published credit cost breakdown (email=1, phone=8, dialer=2/min) lets teams calculate expected monthly spend before choosing a plan, with no hidden per-feature pricing
500,000+ companies using the platform, with an expanded compliance stack including CASA Tier 2, PCI DSS, and EU-US DPF in addition to the standard GDPR/CCPA/SOC2/ISO27001
Tradeoffs
Phone lookups consume 8 credits each, which depletes credit pools significantly faster than email lookups at 1 credit. Teams running phone-heavy prospecting should model credit burn at the phone-to-email ratio for their specific workflow before selecting a plan
Organization plan requires a minimum of 3 users, which prevents smaller teams from accessing SSO and advanced security features without purchasing unused seats
Monthly billing prices for paid plans are not confirmed, which limits flexibility for teams that cannot commit to annual billing
Final Take
Our recommendation
Apollo is the default pick for the vast majority of B2B sales teams. Transparent tiered pricing, built-in sequences, email warmup, a documented credit model, and a free plan that supports real outreach activity remove every barrier to evaluating the platform before committing. The all-in-one structure means teams going from data to sequences to CRM enrichment work within one tool at a predictable published cost.
Seamless.AI is worth evaluating when raw database size and real-time mobile number coverage are the primary requirements and the team has the internal procurement capacity to work through a sales-led contract process with multiple add-ons to scope. The 1.8B+ email and 414M+ mobile number claims represent a meaningful dataset advantage if the actual match rate against your ICP geography is verified through a pilot before signing.
Start with Apollo's free plan. Test database coverage against your ICP before any paid commitment. If Apollo's contact coverage consistently gaps on your specific target profile, request a Seamless.AI pilot against the same list before entering a contract negotiation. The database quality test on your actual ICP is the only evaluation that matters for this decision.
Common Questions
Frequently Asked Questions
Seamless.AI is better for teams where raw database size and real-time mobile number volume are the primary evaluation criteria and a sales-led procurement process is acceptable. Apollo is better for teams that need transparent pricing, built-in email sequences and warmup, a documented credit model, and the ability to start and evaluate without a vendor conversation. For most self-serve teams, Apollo's combination of published pricing and bundled outreach tooling is the stronger practical choice.
Apollo publishes prices: Basic at $49/mo, Professional at $79/mo, and Organization at $119/mo (all annual billing, minimum 3 users on Organization). Seamless.AI publishes nothing beyond the free tier. Pro and Enterprise pricing requires a sales conversation, and each add-on for Buyer Intent, Autopilot, AI Assistant, Enrichment, and API is separately priced on top of the base contract. A fully-loaded Seamless.AI quote with required add-ons will typically exceed Apollo's equivalent plan cost, but the exact difference is not determinable without a vendor quote.
Seamless.AI includes an Engagement Hub called Connect that covers email, calling, social selling, and tasks. Email warmup is not confirmed as a built-in deliverability feature in Seamless.AI's documented platform. Apollo includes unlimited email sequences on all paid plans and a deliverability suite with email warmup starting at the Basic plan. Teams that treat warmup and inbox placement as core workflow requirements will find Apollo's bundled deliverability tooling more immediately operational than Seamless.AI's current documented feature set.
Some teams use Seamless.AI as a contact sourcing layer and Apollo as the sequencing and deliverability layer, exporting contacts from Seamless.AI into Apollo for outreach execution. This removes the redundancy of paying for outreach capabilities in both tools simultaneously. The practical challenge is that both platforms are positioned as all-in-one stacks, so running both creates overlap on data, enrichment, and CRM sync that requires deduplication management. For most teams, choosing one platform and testing coverage gaps before adding a second is the more operationally manageable approach.
Both tools have free plans. Test database coverage before committing to either.
Apollo's free plan covers sequences and 900 credits per month. Seamless.AI's free tier provides 1,000 credits across the year. Run both against the same ICP list to compare contact hit rates before entering any paid contract.
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