Seamless.AI vs SignalHire: Data Enrichment Tool Comparison

SignalHire pricing is published down to the credit. Its pricing page shows three paid plans, Emails, Phones and a combined Emails & Phones plan, each on a three-stop credit slider that runs from $49 to $99 a month on monthly billing, above a free plan of 5 or 10 credits. Seamless.AI prices one plan in public, a free plan of 1 user and 50 credits, and sends both paid tiers to sales. Between them they cover the two commonest shapes a contact data purchase takes, and neither shape is the obvious one.

The Quick Answer

SignalHire is the one with published rates. On monthly billing its pricing page lists Emails at $69 a month for 1,000 credits and Phones at $69 a month for 435 credits, with a combined Emails & Phones plan priced like Phones; the page opens on yearly billing, where the same middle stops read $57 a month. Seamless.AI publishes a free plan of 1 user and 50 credits and quotes both paid tiers. Pick SignalHire when the channel and the volume are known; pick Seamless.AI when the search surface and its add-on signals are the point.

SignalHire pricing: what each plan costs

SignalHire's pricing page shows a free plan with 5 or 10 credits, three paid plans called Emails, Phones and Emails & Phones, and a Scale plan sold through sales. Each paid plan has a three-stop credit slider. On monthly billing the stops cost $49, $69 and $79 for Emails, and $49, $69 and $99 for Phones and for Emails & Phones.

Stop	Emails	Phones	Emails & Phones
Billed monthly
Low	$49, 600 credits	$49, 300 credits	$49, 300 credits
Middle	$69, 1,000 credits	$69, 435 credits	$69, 435 credits
Top	$79, Unlimited Package	$99, Unlimited Package	$99, Unlimited Package
Billed annually, the view the page opens on
Low	$39, 7,200 credits	$39, 3,600 credits	$39, 3,600 credits
Middle	$57, 12,000 credits	$57, 5,400 credits	$57, 5,400 credits
Top	$63, Unlimited Package	$83, Unlimited Package	$83, Unlimited Package

Free plan: 5 or 10 credits. Scale: priced through sales.

The credits are what differ. At the $69 stop the Emails plan carries 1,000 credits and the Phones plan 435, so a phone number costs more than twice what an email does. The top stop of each slider is an Unlimited Package, at $79 for Emails and $99 for the other two, and its card shows no credit count, so ask what it caps before relying on it.

The page opens on yearly billing. There the middle stops read $57 a month billed annually, for 12,000 email credits or 5,400 phone credits, and the low stops $39 a month for 7,200 or 3,600. The free plan's second number comes from the browser extension: the page says installing it adds 10 free credits every month. Every paid card lists unlimited users, and the pricing FAQ says SignalHire does not charge per seat. The page on SignalHire pricing walks through the plans on their own.

What a credit buys is set out on SignalHire's own pages. The homepage says one credit returns every available contact for a profile and is only charged on success, and the pricing FAQ says a lookup subtracts a credit only if at least one email address or phone number comes back.

Source: SignalHire Pricing

What is SignalHire, and how is Seamless.AI different?

SignalHire is a contact finder. Its homepage describes real-time verified personal and work contacts for recruiters, sales professionals, and marketers, reached through a searchable database, a browser extension, bulk CSV enrichment and an API. It reports 95%+ email accuracy and an 85%+ hit rate on social media, both figures its own. Its homepage puts the database at 900M+ profiles, while the plan cards on its pricing page say 850M+, so quote whichever page you are reading.

Seamless.AI's homepage calls it a real-time search engine that helps B2B companies find accurate sales leads, and says it is a real-time search engine, not a database. Its pricing page sells buyer intent data, data enrichment, Autopilot and an AI Assistant as add-ons.

Both claim real-time lookups, so the difference is in how they sell. SignalHire splits its catalogue by contact type, so a buyer chooses a channel before choosing a volume. Seamless.AI sells one credit that covers a phone and an email and builds its signals around it. The first shape suits a team that knows exactly what it needs; the second suits one still working that out.

Pricing Comparison

Seamless.AI Pricing

Seamless.AI's pricing page shows no rate on either paid tier. It does say what the tiers are built on: Pro is sold per user on annual credit packages, one credit covers a phone and an email, and Pro plans start off at 10,000 annual credits. Everything above the free plan goes through a sales conversation.

Source: Seamless.AI Pricing

What the two cost at a realistic volume

The arithmetic below is illustrative and uses SignalHire's list prices on monthly billing. The volumes are invented for the comparison rather than measured.

A team that needs 1,000 emails a month and no phone numbers pays $69 a month for the Emails plan, and the allowance matches the need. A team that wants an email and a phone number for the same 400 people a month has two ways to buy. Emails plus Phones at their $69 stops costs $138 a month. The Emails & Phones plan at its $69 stop costs $69 for 435 credits, and if one credit returns both for a person, as SignalHire's homepage describes a credit, that single plan covers both channels for up to 435 people.

That gap is the number to carry into a decision: buying the two single-channel plans for the same people pays twice. Phone numbers remain the expensive half. At the $69 stop an email credit works out at about $0.07 and a phone credit at about $0.16, which is a reasonable reflection of how much harder numbers are to verify and a real constraint on a calling motion.

Seamless.AI cannot be placed beside those figures, since its page publishes only the free tier's 50 credits and the Pro floor of 10,000 annual credits. The useful preparation is a written statement of volume by channel before the sales call, because that is exactly the split SignalHire prices explicitly. What Seamless.AI's free tier does settle, cheaply, is whether its search finds the people SignalHire misses.

Features Breakdown

Seamless.AI lists

• Email addresses and cell phones
• A real-time search engine
• Pitch intelligence and a job changes filter
• Connect, for emailing, phone calls and tasks
• API access
• Add-on Buyer intent data
• Add-on Data enrichment, Autopilot, AI Assistant

SignalHire lists

• Access to 850M+ profiles and 30M+ companies
• Unlimited users and unlimited exports
• CSV enrichment and CSV export
• Team management
• A browser extension
• ATS/CRM integration and API access
• Scale plan Job changes tracking

Both vendors describe their lookups as real time, so freshness is a claim to test rather than a difference to read off a page. SignalHire's homepage says contact details are verified with third-party tools before they are displayed; Seamless.AI's says that if an email is invalid, the credit is refunded automatically. Those are two different promises about the same failure.

Seamless.AI's list runs toward search breadth and its add-on signals. The comparison worth making is not feature against feature but resolution rate against resolution rate on the same hundred contacts, because both vendors describe capabilities that only pay off if the underlying data covers your market.

Integration Ecosystem

Seamless.AI's integrations page names major CRMs, among them Salesforce, HubSpot, Microsoft Dynamics 365, Pipedrive and Zoho CRM, sales engagement platforms such as Outreach and Salesloft, and automation through Zapier and Make. Its homepage says it connects instantly with 6,000+ tools.

SignalHire's integrations page lists 25+ tools, and most of them are applicant tracking systems: Recruitee, Zoho Recruit, JazzHR, Workable and Ashby among them, beside Salesforce, Pipedrive, Zoho CRM, Salesloft and ActiveCampaign. HubSpot is not among the tools that page lists, and its homepage offers a CSV fallback for any tool not covered natively.

Both reach Salesforce, Pipedrive, Zoho CRM and Salesloft. For SignalHire the integration question that matters is where phone numbers land, because a calling motion needs them in a dialer and not in a notes field. A HubSpot team should test the CSV route or the API before buying.

Who Should Pick Which

Pick SignalHire when the channel is decided and the volume is known. The slider pricing rewards precision: a team that needs emails only gets 1,000 a month for $69 on monthly billing and pays nothing toward a phone capability it will not use, and a team that needs both for the same people buys the combined plan instead of two.

Pick Seamless.AI when the requirement is still fuzzy or when the add-on signals matter. Its pricing page lists buyer intent data as an add-on, and SignalHire's pricing page lists no intent product. Job change tracking, by contrast, appears on both pages, on SignalHire's Scale plan and as Seamless.AI's job changes filter, so it no longer separates the two.

The comparison with Datanyze is a useful counterpoint if the missing signal is technographic rather than a phone number.

Where Each One Sits in a Cold Outbound Stack

Both tools now reach past the list. SignalHire sells email sequences that automate multi-step cold email outreach from your own mailbox, and Seamless.AI's pricing page says all plans now include Connect, for emailing, phone calls and tasks. Both are built for multi-step sequences. A team that sends one message per campaign, with no bumps and no thread replies, uses neither vendor's follow-up steps.

Their real job is still the front of a wave: turning a name into an address. SignalHire's verification before display is convenient and is not a reason to skip verification, because a vendor confirming its own output is not an independent check.

Verify separately, because a bounce costs sending reputation shared across every campaign on the same domains. A phone number resolved alongside an email is a separate motion rather than a follow-up to it. The Adapt.io comparison covers the same stack question from the list-building side.

Switching Between Them

Moving off SignalHire depends on which cards you hold. Its FAQ says a monthly or yearly subscription can be stopped at any time and that remaining credits stay usable until the end of the current billing cycle, so time the switch to the end of the cycle. A team holding both single-channel plans has two cycles to run down.

Moving off Seamless.AI means auditing the add-ons before assuming parity. SignalHire's pricing page lists no intent product, so a contract carrying Seamless.AI's buyer intent add-on is being partly discontinued rather than replaced. Establish whether that feed changed any targeting decision in the last quarter.

Re-verify whatever is carried across in either direction. Real-time resolution is only real time at the moment it happens, and an exported list ages like any other. Apollo.io compared against Seamless.AI covers the case where the replacement is a bundled platform instead.

Feature Comparison Summary

Getting Started Checklist

1. Split the monthly requirement by channel and by person, because SignalHire prices Emails, Phones and a combined Emails & Phones plan separately.
2. Note that $69 on monthly billing buys 1,000 email credits or 435 phone credits, and budget the calling side accordingly.
3. Decide whether intent signals are actually needed, since only Seamless.AI's pricing page lists a buyer intent add-on.
4. Run the same hundred target contacts through SignalHire's free credits and Seamless.AI's 50, counting resolutions per channel.
5. Ask Seamless.AI in writing which add-ons a quote covers and how many annual credits it carries.
6. Keep verification independent of whichever vendor supplied the address.

Final Thoughts

SignalHire is the better buy when the requirement is precise, and its split pricing is an advantage rather than a quirk for a team that needs one channel. Seamless.AI is the better buy when targeting signals matter or the requirement is still moving.

If SignalHire's sourcing strength leaves a gap in outreach orchestration, see how it stacks up against a sales engagement platform in Apollo.io versus SignalHire comparison.

Write down the volume by channel before either conversation. It settles more of this than any feature list.

Related Reading

• Lusha vs SignalHire: Data Enrichment Tool Comparison
• Lusha vs Seamless.AI: Data Enrichment Tool Comparison
• SignalHire vs UpLead: Data Enrichment Tool Comparison

If you would rather have this run for you, RevenueFlow books qualified meetings on a pay-per-meeting basis and publishes client results.

Pricing and features are taken from the vendors' own pages. Verify current terms with the vendor before relying on them.