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Every major outbound platform now sells you an AI prospecting agent, and they are four genuinely different products wearing the same label. We build these for a living: we install HubSpot's Breeze Prospecting Agent for clients, we published the hands-on walkthrough of Amplemarket's Duo Copilot, we are HubSpot and Apollo partners, and we have watched buyers mix these up on sales calls all quarter. So here is the comparison we wish existed: what each agent actually is, what it costs as of November 2026, what feeds its brain, how it connects to Claude and ChatGPT through MCP, and which one we would pick in six real situations.
Short on time? The verdicts: HubSpot Breeze if HubSpot is your system of record and you want the agent working your real pipeline history. Apollo if you already pay for Apollo data and want agents running in Slack this week. Instantly if you are a volume cold email operation and want data, sending and agents under one self-serve roof. Amplemarket if you sell on buying signals and want a sales-led, all-in-one platform with white-glove onboarding. The long version, with the receipts, is below. And if you would rather watch one get built from a blank portal, that is literally what we are doing Wednesday at the free live workshop.
What launched, and when
This category moved fast enough in 2026 that the dates matter:
- February 24, 2026: Apollo ships its MCP server and native Claude connector, letting you search leads, enrich contacts and manage sequences from inside a Claude conversation. We covered it in our Apollo plus Claude walkthrough.
- This year, rolling: HubSpot rebuilds its Prospecting Agent on the Plays model (audience, selling context, outreach, guardrails and automation as one unit) and ties the whole AI layer to Growth Context, its customer-context system.
- September 22 to October 27, 2026: Instantly ships a lineup of specialist agents (including a voice agent that calls inbound leads), then launches Lead Finder on October 27: a 555 million contact database with live buying signals and, in Instantly's own words from the changelog, "autonomous outreach with AI Agents" that runs follow-ups through to booked calls.
- Fall 2026: Amplemarket rolls out Duo Copilot, agents you configure around a buying signal, and exposes the platform to Claude through its own MCP server.
- This week, November 2026: Apollo launches three named agents (Lead Discovery, Sequence Creation, Sequence Optimization) delivered through a new Slack app, with a walkthrough webinar on November 11. The agents are live for Pro and Organization plans.
The basics, side by side
Two tables, because cramming everything into one is how comparisons become mush. First, the commercial facts:
| Where it lives | Contact data | Price (as of Nov 2026) | Way in |
|---|
| HubSpot Breeze | Inside your HubSpot portal | Your CRM, plus one connected source: Apollo, Surfe, ZoomInfo or Seamless | No agent SKU. Needs any Hub subscription plus Smart CRM Professional, then pays per use in HubSpot Credits: about 100 credits per recommended lead at roughly $10 per 1,000 credits, call it a dollar a lead | Already in your portal if you qualify; the gating item is setup quality |
| Apollo | Apollo platform, agents delivered via Slack DMs | Apollo's own B2B database | Free tier exists; Basic and Professional per-seat tiers (Apollo publishes details behind its pricing page); the new agents require Pro or Organization | Fastest trial in the category if you already have a plan: install the Slack app |
| Instantly | Instantly app, on its sending infrastructure | 555M+ lead database with enrichment | Self-serve: outreach plans from $47/mo, bundles with agents from $94/mo (Starter), $194/mo (Scale), $555/mo (Agency), cheaper on annual, as of Nov 2026 | Swipe a card, start sending |
| Amplemarket | Amplemarket platform | Amplemarket's data layer | Custom, sales-led; book a demo | Considered purchase with onboarding help included |
And second, how each agent actually behaves:
| What triggers it | Who writes the emails | Human review | Context it learns from | Claude and MCP access |
|---|
| HubSpot Breeze | Buying signals you pick per play (funding, launches, research topics) plus a year of your engagement history | The agent, in adaptive mode (it adjusts each email to the prospect's behavior), or your own sequence steps | Your choice per play: approve every email, or send without review inside guardrails (tone, business days only, send windows, email caps) | Growth Context: your brand voice, ICPs, personas and product catalog, plus the CRM itself. Garbage in, garbage out applies hard here | HubSpot ships its own MCP connector, so assistants like Claude can read and work your portal |
| Apollo | Scheduled background runs over Apollo data and your sequence performance | Sequence Creation drafts full sequences: audience, strategy and copy | Mandatory for now: every recommendation arrives as a Slack DM you approve before anything runs | Apollo's Context Center: what you sell, to whom, in your words | Native MCP server plus Claude connector since February; search, enrich and sequence from a Claude chat |
| Instantly | Live buying signals and lead scoring across its database | Its AI agents, through to automated follow-ups and booking | Optional: you set how autonomous the agents run; keep review on until deliverability and targeting prove out | Your campaigns, your inbox activity, and an in-app AI assistant across the product | No public MCP server that we have seen as of November 2026 |
| Amplemarket Duo | One buying signal per agent: job changes, funding, website visits and more | Duo, with a per-agent choice of autopilot or wait-for-review | Per agent: autopilot once you trust it, review mode while you do not | Signal definitions, your filters, and the selling context you give Duo | Amplemarket MCP server: research prospects, enrich companies and analyze outreach from inside Claude |
HubSpot Breeze Prospecting Agent: the CRM-native one
This is the agent we install most, so we will be specific. The unit of work is a play. A play bundles the audience (segments the agent watches), selling context (what you offer that audience), outreach settings, guardrails and automation rules. You run several plays at once for different motions: we typically launch inbound follow-up, re-engagement and targeted outbound together. The agent watches your segments for buying signals, weighs a year of engagement history, and can source net-new contacts matching your personas from your CRM or one external source. Apollo is one of those sources, which matters in a comparison like this: the two are partners inside the product, not just rivals.
The intelligence layer is the real story. HubSpot's agents all draw on Growth Context: your business profile, brand voice, ICPs, personas and product catalog, scored for completeness by Context Home. In our builds, the difference between a mediocre Breeze agent and a scary-good one is almost never the agent settings. It is whether that context layer and the underlying CRM are clean. It is why we make clients clean house first and why every engagement starts with a free personalized starter pack that drafts the context for you.
Money: there is no agent line item. You need a Hub subscription and Smart CRM Professional, then the agent burns HubSpot Credits as it works, roughly 100 credits per recommended lead at about $10 per 1,000 credits as of November 2026. About a dollar per worked lead, which is cheap right up until the agent is enrolling a dirty segment, which is why the cost conversation is really a data-hygiene conversation. Full math in our cost breakdown.
Our take: the highest ceiling of the four if HubSpot holds your revenue truth, because it prospects with memory: it knows who ghosted you in March and who opened the pricing email twice. Also the one where sloppy setup costs you real money. Our recommended defaults from client builds: adaptive outreach over rigid sequences, a five email cap, review on for the first two weeks, then send-without-review inside guardrails.
Apollo: the one that moved into Slack this week
Want to try it while reading this? Apollo's free tier is here; the agents need Pro or Organization.
Apollo's three new agents are named like job functions. Lead Discovery runs in the background and proposes audiences from Apollo's database that fit your ICP, with the reasoning attached. Sequence Creation drafts complete sequences from your Context Center: audience, strategy and copy. Sequence Optimization watches your live sequences for opens, replies, bounces and spam signals, then suggests fixes. All three deliver their work as Slack DMs with approve buttons, and nothing executes without your approval. Apollo says the mandatory approval step is deliberate for now, and we think that is the right call for trust-building, with one warning: an agent that waits on Slack approvals is only as fast as your team's Slack hygiene.
The underrated half of the Apollo story is MCP. Since February, Apollo has run a native MCP server and Claude connector: from a Claude conversation you can search leads in plain English, pull company research, enrich records and push contacts into sequences, with OAuth and your plan's permissions enforced. If your team is already working in Claude, that turns Apollo into infrastructure rather than another tab, and it is exactly the pattern we build for clients as custom MCP connectors when the tool in question does not ship its own. Our Apollo plus Claude setup guide walks through it.
Our take: the fastest path from zero to a working agent in this lineup, and the cheapest way to find out whether your team will actually collaborate with one. The trade: Apollo stays the brain of its own world. Your CRM is a sync target, and context lives in Apollo's Context Center rather than your system of record.
Instantly: the volume operator's agent
Trying it costs less than lunch: Instantly's plans start at $47 a month, with agent-inclusive bundles from $94.
Instantly built its reputation on sending infrastructure: unlimited connected inboxes, warmup, rotation and deliverability tooling for cold email at volume. The agent story now sits on top. The October 27 Lead Finder launch added a 555 million contact database, proactive AI lead recommendations and live buying signals with scoring, and its changelog headline promised "autonomous outreach with AI Agents" that carries follow-ups through to booked calls. That capped a six week shipping streak that also delivered specialist agents for partnerships, recruiting, user research and investment outreach, a voice agent built on ElevenLabs that calls new inbound leads, and a deliverability agent that monitors your sending setup and blacklists. Nobody in this comparison shipped faster this fall, and the founder has been documenting the run loudly in public; the changelog reads like a weekly product keynote.
Pricing is the self-serve outlier of the group, as of November 2026: outreach plans from $47 a month, credit plans for the database, and bundles that combine sending, data and agents at $94 (Starter), $194 (Scale) and $555 (Agency) on monthly billing, less on annual. Which agents you get depends on the tier, so read the bundle grid closely before you buy for a team.
Our take: if your motion is high-volume cold email, this is the most complete stack for the money, and the only one here you can fully evaluate on a card swipe without talking to sales. It is also the least CRM-native of the four. Plan the sync back to your system of record on day one, and keep the agents on a leash until your domains have reputation; our outbound infrastructure guide covers the warmup discipline that applies to any sender, Instantly included.
Amplemarket Duo: the signal-first one
Amplemarket starts from a different question: not "who fits your ICP" but "who just did something that means they are in market". A Duo Copilot agent is configured in four steps. Pick the signal it tracks: job changes, funding rounds, website visits and more. Filter who counts. Choose which rep the leads route to. Then decide how Duo writes and whether it runs on autopilot or waits for review, set per agent, which is the most granular trust dial in this comparison. The output is not a list, it is assigned leads with context and drafted outreach attached. We published the complete setup walkthrough this week, with the agent we recommend building first: how to create your first Duo Copilot agent.
Amplemarket also ships its own MCP server and Claude integration: research prospects, enrich companies and analyze outreach from inside Claude, the same pattern as Apollo. Pricing is custom and sales-led, there is no public price list, and the product assumes you want one vendor as data layer, signal engine and sender together, with onboarding included. Book an Amplemarket demo through our partner link if the signal-first model sounds like your motion.
Our take: the strongest opinion about how selling should work: signals first, reps second, volume last. Teams that already believe that love it. Teams that want a cheap experiment should start elsewhere, because sales-led pricing means commitment before proof.
Which one should you pick? Six real situations
HubSpot is your CRM and your data is decent: Breeze, no hesitation. Nothing else prospects with your pipeline history. HubSpot is your CRM and your data is a swamp: clean up first, then Breeze; an agent on dirty data is a dollar-per-lead machine for embarrassing emails. You already pay Apollo for data: install the Slack app this week; it is the cheapest possible test of whether agents fit your team. You run volume cold email as the core motion: Instantly, and spend your first month on deliverability discipline rather than agent autonomy. You sell into fast-moving markets where timing is the edge: Amplemarket's signal-first design was built for exactly that. Your team lives in Claude: Apollo and Amplemarket both speak MCP today, HubSpot's portal does too, and this stops being a platform choice and becomes a connector strategy, which is precisely the conversation we have in MCP connector builds.
One more pairing worth repeating because nobody's marketing will tell you: HubSpot's agent can use Apollo as its contact source. CRM context from HubSpot, database from Apollo, one agent doing the work. We set that up for clients regularly.
Frequently asked questions
What is an AI prospecting agent?
Software that does the SDR's research-and-first-touch loop on its own: watches for buying signals, picks or sources matching contacts, writes personalized outreach, sends it within rules you set, and adjusts follow-ups based on behavior. The four in this comparison differ mainly in whose data they run on and how much human approval sits in the loop.
Do AI prospecting agents replace SDRs?
No. In the deployments we have run, the agent absorbs list-building and first drafts, and the humans move up to reply handling, calls and relationships. Teams that fire the humans and keep the agent get a louder version of their worst outbound.
What does HubSpot's Prospecting Agent cost to run?
No separate fee: a Hub subscription plus Smart CRM Professional, then usage billed in HubSpot Credits at roughly 100 credits per recommended lead, about $10 per 1,000 credits as of November 2026. Around a dollar per lead the agent works.
How much does Instantly cost compared to the others?
Instantly is the self-serve option: outreach from $47 a month and agent-inclusive bundles from $94 to $555 a month as of November 2026. Apollo has a free tier with agents gated to Pro and Organization plans. HubSpot prices by credits on top of your subscription. Amplemarket is custom and sales-led.
Which agents work with Claude and MCP?
Apollo (native MCP server and Claude connector since February 2026) and Amplemarket (its own MCP server for research, enrichment and outreach analysis) both do, and HubSpot portals are reachable over HubSpot's MCP connector. We have not seen a public MCP server from Instantly as of November 2026. If a tool you depend on lacks one, that is a buildable gap.
Can HubSpot's agent use Apollo data?
Yes. As of November 2026 the Prospecting Agent connects one external contact source at a time, and Apollo is supported alongside Surfe, ZoomInfo and Seamless.
Which is fastest to get live?
Apollo for existing customers: install the Slack app and approve the first recommendations. Instantly for new buyers: self-serve signup to first campaign in a day. HubSpot and Amplemarket take real setup because they do more inside your systems, which is also why their output is better once configured.
If you want to watch the HubSpot one get built live before you choose anything, join us Wednesday, November 18 at noon Central: we are building an AI Prospecting Agent from an empty portal, every click on screen, and you can bring your own setup questions.
