TL;DR
- This category consolidated faster than any other part of the GTM stack in 2026. Pocus joined Apollo in March, Zoom agreed to acquire Common Room in July, Koala was acquired by Cursor and sunset entirely, and Warmly was acquired by HubSpot. Vendor independence is now a real evaluation criterion.
- Clay is the strongest fit for teams that want to define their own signals rather than accept a vendor's model, from $185 per month, and it is the only major option in this list that has not been acquired.
- Unify is the strongest fit for teams wanting signals and outbound execution in one system, and is now the primary independent alternative to the acquired platforms.
- Common Room remains the most complete person-level signal product, but the Zoom acquisition means you should not sign multi-year terms without clarity on the integration path.
- If you are evaluating a platform that was acquired in the last twelve months, negotiate short terms and an exit clause. Koala customers lost login access and data export when that product sunset.
Contents
- What a buying signal platform actually does
- The 2026 consolidation and what it means for buyers
- Comparison table: signals, activation, and pricing
- The 6 platforms reviewed
- Signal types and which ones convert
- Vendor risk as a purchase criterion
- Which platform fits which team
- FAQ
What a buying signal platform actually does
A buying signal platform sits between your data sources and your outbound execution. It ingests signals from many places, resolves them to a person or account, scores them, and triggers an action.
The signals themselves fall into recognisable groups. Product signals cover trial signups, feature usage, and usage decline. Hiring signals cover job postings that imply a project or a budget. Job change signals cover a champion moving companies. Community signals cover activity in Slack groups, GitHub, and forums. Website signals cover de-anonymised visits. Technographic signals cover changes in a company's tech stack. Funding signals cover raises that release budget.
The platform's value is not in any one signal. It is in unifying them under a single identity graph so that five weak signals about the same person compound into one strong one, and then activating that automatically rather than putting it on a dashboard that nobody opens.
That second half is where most implementations fail. A signal that produces a Slack notification which nobody actions is worth nothing.
The 2026 consolidation and what it means for buyers
Four of the platforms that would have appeared in this comparison a year ago no longer exist as independent products.
Koala was acquired by Cursor in July 2025. The product sunset on 30 September 2025, with no login and no data export available afterwards. Customers lost access.
Pocus was acquired by Apollo.io, announced 19 March 2026. Apollo cited over 400% growth in enterprise accounts over the preceding twelve months and folded Pocus's signal layer into its GTM platform. Pocus is now waitlist-only. Before the acquisition Pocus claimed $500M in qualified pipeline generated per quarter across customers including Monday, Canva, and Asana.
Common Room entered a definitive agreement to be acquired by Zoom on 2 July 2026. The technology folds into Zoom Revenue Accelerator. Common Room serves over 400 customers, and financial terms were not disclosed.
Warmly has been acquired by HubSpot.
The pattern is clear. Signal intelligence is being absorbed into larger platforms that already own the conversation layer or the CRM. That is rational for the acquirers and inconvenient for buyers, because it means the standalone products either disappear or become features of a suite you may not want.
The practical implication for anyone evaluating right now: treat vendor independence as a scored criterion, negotiate twelve-month rather than multi-year terms with any recently acquired vendor, and require a contractual data export commitment. The Koala sunset established that losing your data is a real outcome, not a theoretical one.
Comparison table: signals, activation, and pricing
| Platform | Ownership status | Signal breadth | Activation | Entry price |
|---|---|---|---|---|
| Clay | Independent | 100+ providers, configurable | Sequencer handoff, webhooks | $185/mo Launch |
| Unify | Independent | Web, intent, job change | Native sequencing built in | Quote |
| Common Room | Zoom acquisition agreed | Community, social, public, web | AI agents, CRM, Slack | ~$12,000/yr Starter |
| Apollo.io with Pocus | Apollo-owned | Product, CRM, behavioural | Native sequencing built in | $49/user/mo annual |
| 6sense | Independent | Co-op intent, proprietary, first-party | Ads, CRM, orchestration | ~$25,000/yr entry |
| RB2B | Retention.com-owned | Website person-level, US only | Slack push, integrations | $79/mo |
| Platform | Free tier | Contract | Implementation cost | Independence risk |
|---|---|---|---|---|
| Clay | Yes | Monthly or annual | Self-serve | Low |
| Unify | No | Annual | Moderate | Low |
| Common Room | No, 14-day trial | Annual only | $5,000 to $20,000 | High |
| Apollo.io | Yes | Monthly or annual | Self-serve | Low |
| 6sense | Yes, 50 credits | Multi-year common | 15 to 25% of platform | Low |
| RB2B | Yes, 150 resolutions | Monthly | None | Moderate |
The 6 platforms reviewed
1. Clay
Best for: Teams with a GTM engineer who want to define what counts as a signal rather than adopt a vendor's opinion.
Clay is a data orchestration platform that calls over 100 providers and lets you compose your own signal logic. Rather than buying a scoring model, you build one: pull job postings, funding events, technographic changes, and CRM state into a table, write the conditions that matter to your business, and fire a webhook when they are met.
Forma Norden's internal assessment ranks Clay first for both signal tracking and data orchestration, with RB2B as the top alternative for signals and Freckle for orchestration.
Pricing: Free tier with 100 data credits, 500 actions per month, unlimited seats, and 200 rows per table. Launch at $185 per month, roughly $167 annually, with 2,500 credits and 15,000 actions. Growth at $495 per month, roughly $446 annually, with 6,000 credits and 40,000 actions. Enterprise custom. The March 2026 repricing cut data costs by 50% to 90%, stopped charging for failed lookups, and moved CRM integrations and HTTP API access down to the Growth tier.
Where it falls short: Clay is a builder's tool. There are no prebuilt signal definitions, no opinionated scoring, and no account manager to call when a workflow degrades. Teams without a dedicated operator find it sits unused, and that is the single most common outcome we see.
Verdict: The strongest fit where you have someone to run it, and the only platform in this list with no acquisition overhang. Clay crossed $100M ARR in June 2026 and raised a $100M Series C at a $3.1B valuation.
2. Unify
Best for: Teams that want signal detection and outbound execution in one system without stitching two vendors together.
Unify combines website de-anonymisation, intent signals, and job change detection with native sequencing, so the signal and the action live in the same product. That integration is the differentiator, because the handoff between signal platform and sequencer is where most implementations lose momentum.
Unify defaults to a cap of 25 emails per mailbox per day, configurable up to 65, and warms a new mailbox in roughly three weeks. Those are conservative, sensible defaults and a reasonable proxy for the product's overall deliverability posture.
Pricing: Quote-based with annual contracts.
Where it falls short: No published pricing and no free tier make evaluation slow. Signal breadth does not match Common Room's community coverage or 6sense's intent depth. The sequencing layer is capable but less mature than a dedicated tool.
Verdict: With Pocus, Koala, and Common Room all absorbed into larger platforms, Unify has become the primary independent option in this category. That matters more in 2026 than it did in 2025.
3. Common Room
Best for: Teams whose buyers are visible in communities, on social platforms, and in public forums rather than only on your website.
Common Room is the most complete person-level signal product here. Its Person360 identity graph resolves fragmented signals across community platforms, social channels, and public sources into a single person record, and RoomieAI agents act on them. Recent development included a CLI and MCP server for headless access, moving the platform from a dashboard to scriptable infrastructure.
Pricing: Starter reported at roughly $12,000 per year for 35,000 contacts and 2 seats. Team at roughly $30,000 per year for 100,000 contacts and 3 seats, though sources also cite $2,500 per month and an Essential tier at $2,100 per month with 5 seats. Enterprise from $60,000 per year for 200,000 contacts, 10 seats, and SAML or SCIM. Vendr's median across 66 to 67 purchases is roughly $30,750 per year, ranging from $13,750 to $102,550. Onboarding adds $5,000 to $20,000 or more. Annual billing only, with a 14-day trial and no permanent free tier.
Where it falls short: The Zoom acquisition is the dominant consideration. Zoom announced the definitive agreement on 2 July 2026, with the transaction expected to close within weeks and the technology folding into Zoom Revenue Accelerator. Pricing, packaging, standalone availability, and integration roadmap are all now uncertain. Forma Norden's internal assessment lists Common Room as the top ABM alternative behind Clay, which predates the acquisition announcement.
Verdict: The best community signal coverage available, bought at a moment of maximum uncertainty. If you buy, buy twelve months with an export clause.
4. Apollo.io with Pocus
Best for: Teams that want signals attached directly to contact data and sequencing in a single low-cost subscription.
Apollo acquired Pocus in March 2026 specifically to add a signal intelligence layer, and the combination is compelling on cost. You get 270M+ contacts, 65+ filters, sequencing, a dialer, and a signal layer for less than most competitors charge for signals alone.
Pricing: Free tier available. Basic at $49 per user per month annual, or $59 monthly. Professional at $79 annual, or $99 monthly. Organization at $119 annual with a three-seat minimum, or $149 monthly. Credits expire each cycle.
Where it falls short: The Pocus integration is recent and depth will lag the standalone product for some time. Apollo's underlying data accuracy sits around 65% to 70% with bounce rates of 15% to 25% per G2 and Trustpilot reviews, which limits how much you should trust downstream signal resolution. Enterprise governance remains thinner than the incumbents.
Verdict: The best cost-to-capability ratio in this list, with the caveat that the signal layer is newly integrated. Apollo is Forma Norden's internal first choice for all-in-one sales prospecting and for general databases.
5. 6sense
Best for: Enterprise teams that want predictive account scoring built on the largest proprietary intent dataset in the category.
6sense blends thirteen years of Signalverse intent data with your first-party CRM and web signals, third-party signals including job changes and funding, and predictive AI that scores accounts by likelihood to buy. It then activates through advertising, CRM, and sales orchestration.
Pricing: Free plan with 50 credits per month. Paid is quote-only. Entry tiers reported around $25,000 per year, with median buyers at roughly $55,000 to $63,000. Vendr data places small deployments at $50,000 to $120,000, mid-market at $120,000 to $250,000, and enterprise at $250,000 to $400,000 or more. Add 15% to 25% for implementation. Procurement typically runs four to twelve weeks.
Where it falls short: Cost and operational overhead put it out of reach for most mid-market teams. It requires dedicated RevOps headcount to run well, and that cost never appears on the quote.
Verdict: The most robust predictive model available, priced for organisations that already have a RevOps function.
6. RB2B
Best for: US-focused teams that want one specific signal, person-level website visits, delivered instantly and cheaply.
RB2B does one thing. It identifies who visited your website by name and pushes their LinkedIn profile into Slack. It is not a signal platform in the full sense, and that narrowness is why it is affordable.
Pricing: Free at 150 monthly resolutions, company-level only. Starter at $79 per month for 300 resolutions with LinkedIn URLs. Pro at $140 to $149 per month for 600 resolutions with business emails and full integrations, scaling to 1,250 and 2,500 resolutions. Pro+ at $199 per month. Unlimited users on all plans. Over 100,000 websites, SOC 2 Type II, 7-day full-feature trial with no card, and a G2 rating of 4.5 across 283 reviews.
Where it falls short: US visitors only, which eliminates it for European or global traffic. Single signal type. RB2B is owned by Retention.com, so it is not fully independent, though it operates as a standalone product.
Verdict: Forma Norden's internal assessment ranks RB2B as the top alternative for signal tracking, and for US traffic it delivers the highest value per dollar of anything here. It is a component, not a platform.
Signal types and which ones convert
Not all signals are equal, and the gap between the best and worst is much larger than most vendors admit.
| Signal | Typical strength | Why |
|---|---|---|
| Champion job change | Very high | Existing trust, no education phase required |
| Pricing page visit, repeat | High | Explicit late-stage buying behaviour |
| Competitor comparison on a review site | High | Active shortlist behaviour |
| Product trial or usage spike | High | Direct evidence of evaluation |
| Relevant job posting | Medium | Implies a project and often a budget |
| Funding round | Medium | Releases budget, but timing is imprecise |
| Technographic change | Medium | Useful for displacement plays only |
| Third-party topic intent surge | Low to medium | Account-level, anonymous, early-funnel |
| Generic blog page visit | Low | Weak intent, high false positive rate |
The practical guidance is to build your programme from the top of this table downward. Teams that start with third-party intent surge, because it is the signal that vendors sell hardest, usually conclude that signal-based selling does not work. What actually happened is that they started with the weakest signal available.
Compounding matters more than any single signal. One pricing page visit is interesting. A pricing page visit from someone whose company just posted a relevant role, two weeks after a funding announcement, is a different proposition entirely. That compounding is the actual argument for buying a platform rather than wiring individual alerts.
Vendor risk as a purchase criterion
Given what happened in this category during 2026, three contract terms are worth more than any feature.
Term length. Twelve months, not three years, for any vendor acquired in the past year. The discount for a multi-year commitment is not worth the risk of the product being folded into a suite you did not buy.
Data export. A contractual commitment to export your data in a usable format on request and on termination. Koala customers had no export after the sunset date. That is the failure mode you are protecting against.
Change of control. A clause giving you the right to terminate without penalty if the vendor is acquired. Vendors resist this and will sometimes concede a shorter notice period instead, which is still worth having.
None of these are unusual asks. They are simply unusual to think of before signing, which is why so many teams in this category spent 2026 renegotiating.
Which platform fits which team
| Situation | Strongest fit | Why |
|---|---|---|
| Have a GTM engineer, want control | Clay | Define your own signals, no acquisition risk |
| Want signals and outbound in one | Unify | Native sequencing, independent vendor |
| Community-led motion | Common Room | Best person-level community coverage, verify Zoom terms |
| Cost-constrained, want signals plus data | Apollo.io | Signal layer plus 270M contacts from $49 per user |
| Enterprise with RevOps function | 6sense | Deepest predictive model and intent dataset |
| US traffic, want one strong signal cheaply | RB2B | $149 per month, person-level, unlimited seats |
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FAQ: Buying Signal Platforms
What happened to Koala, Pocus, and Common Room?
All three were acquired. Cursor acquired Koala in July 2025 and the product sunset on 30 September 2025 with no login or data export afterwards. Apollo.io acquired Pocus in March 2026 and it is now waitlist-only. Zoom announced a definitive agreement to acquire Common Room on 2 July 2026, folding it into Zoom Revenue Accelerator.
What is the best free buying signal tool?
Clay's free tier includes 100 data credits and 500 actions per month with unlimited seats, which is enough to build and test a basic signal workflow. RB2B offers 150 free monthly resolutions at company level. 6sense provides 50 credits per month. Apollo.io has a free tier that includes limited signal access.
How much does a buying signal platform cost?
Entry points range from $185 per month for Clay to roughly $12,000 per year for Common Room Starter and $25,000 per year for 6sense. Median contracts sit near $30,750 for Common Room and $55,000 to $63,000 for 6sense. Implementation adds $5,000 to $20,000 for Common Room and 15% to 25% of platform cost for 6sense.
Which buying signals actually convert?
Champion job changes, repeat pricing page visits, competitor comparison activity on review sites, and product trial usage are the strongest. Third-party topic intent and generic page visits are the weakest, despite being the signals vendors market hardest. Build from the strongest signals downward.
Should I buy a signal platform or build with Clay?
Buy a platform if you lack a dedicated operator and want prebuilt scoring and playbooks. Build with Clay if you have a GTM engineer and want signal definitions specific to your business. The failure mode for Clay is that nobody operates it. The failure mode for platforms is paying for a scoring model that does not match how your market actually buys.
How do I protect against my signal vendor being acquired?
Negotiate twelve-month terms rather than multi-year, require a contractual data export commitment covering termination, and ask for a change of control clause permitting termination without penalty. Given four acquisitions in this category within twelve months, these are proportionate rather than paranoid.
Yananai A. Chiwuta
Author
Yananai Chiwuta is a Go-To-Market Architect and founder of Forma Nôrden. He builds Go-To-Market growth systems for B2B companies selling into enterprise and mid-market accounts.
Celine Sky
Reviewer
Celine ensures technical accuracy and strategic alignment across all Forma Nôrden playbooks and resources.
