AI SDR tools in 2026, compared honestly, and why we built the opposite.

An AI SDR is software that takes over the sales development rep workflow end to end: it picks target accounts, researches them, writes the outreach, sends it across email and sometimes LinkedIn or phone, handles the replies, and books the meeting, with little or no human review in between.

That last clause is the whole category. Plenty of tools help a person do outbound faster. An AI SDR is sold as a replacement for the person, which is why vendors give the products human first names. Artisan sells "Ava". 11x sells "Alice" and "Julian". AiSDR sells "Ami". The naming is not decoration, it is the pitch: you are hiring a worker, not buying a tool.

The practical differences between vendors come down to four things: where the contact data comes from, which channels the agent can act on, how much autonomy it has before a message goes out, and whether you can see the price without talking to sales.

Amplemarket is the least autonomous of the four, and positions that as the point: it researches and drafts, then a human approves before anything sends.

Its homepage headline in July 2026 is "Step into the future of sales: Human + AI". The platform sources prospects from its own B2B database plus signals like job changes, G2 activity and website visitors, then drafts multichannel sequences across email, LinkedIn, phone, voice notes and video.

Published pricing: the Startup tier is $600 per month billed annually, covering 2 users, 27,000 contacts, 13,500 email credits per user per year and 600 phone credits per user per year. The Growth and Elite tiers are contact sales. A free trial is offered on all plans. Source: amplemarket.com/pricing, July 2026.

One thing we could not verify: a third-party site reports Amplemarket claiming a $125M Series B in a March 2026 post. We found no press release, no news coverage and no database entry corroborating it, and the third-party site itself flags the discrepancy. We are not repeating it as fact.

AiSDR is the only one of the four that publishes a full public price list, and it has the lowest entry point at $250 a month.

Its homepage headline is "Your AI SDR that books meetings that close". The agent, called Ami, researches from web signals, LinkedIn activity and company news, enriches against HubSpot or Salesforce, then writes, sends, follows up, qualifies replies and books.

Published pricing: Solo is $250 per month or $2,400 per year, covering 1 user, 200 AI-researched contacts a month, 1 domain, 3 mailboxes and 1 LinkedIn account. Explore is $900 per month on a quarterly contract with 800 contacts a month. Scale is $2,500 per month on a quarterly contract with 2,500 contacts a month. Managed service is an add-on at both upper tiers. Source: aisdr.com/pricing, July 2026.

Worth reading closely: the tiers are priced per researched contact, not per message. At Solo, 200 contacts a month is the ceiling on how much market the agent can touch. Compare that against the size of your addressable list before assuming the entry tier is enough.

11x is the most venture-funded of the four and the most autonomous in its marketing, and it is also the one with a documented credibility problem in the press.

The company sells two agents, Alice and Julian, pulling from 50+ data sources and acting across email, LinkedIn, phone and SMS. Its site references $70M+ raised from a16z and Benchmark. Its homepage headline in July 2026 is "The AI Growth Company".

Pricing: none published. We checked both /pricing and /pricing/ in July 2026 and both returned 404, and the product pages carry no figures. Third-party sites quote everything from $5,000 a month to $60,000 a year. We could not verify any of those against a vendor source, so we are not repeating them.

The reporting: in March 2025 TechCrunch reported that 11x was displaying companies as customers that were not customers. ZoomInfo told TechCrunch: "We did not give them permission to use our logo in any manner, and we are not a customer," and added that 11x's product "performed significantly worse than our SDR employees." The same piece, sourced to nearly two dozen people, reported trial contracts being counted toward ARR and quoted an employee saying "We were losing 70-80% of customers that came through the door." Read it yourself: TechCrunch, 24 March 2025.

Context that matters: that reporting is from early 2025 and the company has changed leadership since. Founder Hasan Sukkar stepped down as CEO in May 2025 and then-CTO Prabhav Jain took over (TechCrunch, 5 May 2025). Judging today's product by 2025 reporting would be unfair. We include it because a buyer doing diligence should know it exists.

Artisan sells "Ava", a fully autonomous AI BDR, and prices it by how many leads you want contacted per month rather than by seat.

Its homepage headline is "Hire Ava / The autonomous AI BDR". Ava sources from a claimed 250M+ verified B2B contacts with 22+ enrichment sources and intent signals, then runs campaigns across email, social and phone, handles objections and books meetings.

Pricing: no dollar figures on any tier as of July 2026. Team covers roughly 2,500 leads contacted a month, Scale roughly 6,000, and Enterprise is custom. Each says pricing is "scoped on your plan". Source: artisan.co/pricing. A third-party site quotes a $3,750 per month "Growth" plan, but no such tier appears on the current pricing page, so we treat that number as stale.

The billboards: Artisan ran a "Stop Hiring Humans" campaign across San Francisco, London and New York. TechStartups reported in October 2025 that it cost under $50,000 and drew heavy backlash, including public criticism from Senator Bernie Sanders (source). Artisan's own response post argues the slogan targets cold-outbound busywork rather than people, and states "We don't think the BDR role should be deleted" (artisan.co/blog/stop-hiring-humans). Whether that reads as a clarification or a walk-back is your call. It is relevant mainly because it tells you what buying signal the brand will attach to your outreach.

In May 2026 The Signal published a piece headlined "AI SDRs Don't Work" from the guy running the company that helped create the category, built on a conversation with 11x CEO Prabhav Jain.

We are going to be careful with this one, because it is widely repeated in a stronger form than the source supports. The phrase is the headline and the author's framing of what Jain told him. There is no transcript-quality sentence in the article where Jain says those words. His argument as the piece presents it is narrower: the "AI SDR" label sets the wrong expectation. The article's own line is "The problem isn't AI. The problem is how teams are deploying it."

So the fair summary is not that the category leader declared his product broken. It is that the person running one of the best funded companies in the category thinks the category's name oversells what it does. That is a smaller claim, and it is still a striking one.

This is the cleanest data point we found. Kyle Poyar's Growth Unhinged published "Who's Actually Hiring in GTM Right Now?" on 20 May 2026, using job posting data from Sumble covering over 3 million verified companies.

The findings: "SDR headcount at AI-native companies has more than doubled year-on-year", while across the wider market "SDR job posts are down 21%". AI-native companies are "hiring 50% more SDRs as a share of their GTM job posts compared to all digital natives". Named examples include Cursor, LangChain, Decagon and OpenAI. Poyar's own line on it: "The companies selling the automation apparently aren't buying all of it."

One caveat we will state rather than hide: hiring SDRs and using AI tooling are not mutually exclusive, and fast-growing companies hire everything. The data shows AI-native firms are not replacing SDRs with agents. It does not prove the agents fail.

You will see confident claims that human-written outbound gets 5 to 12 percent reply rates while AI SDRs get 3 to 8 percent. We went looking for the primary source behind that range and could not find one. We are leaving the numbers off this page rather than passing them along.

What we did find, and what a buyer should actually know:

Belkins publishes a reply rate of 0.45% across 7,530,489 emails sent, measuring replies divided by sends. Instantly reports its own platform's AI SDR average at 3.43%, with top-quartile campaigns at 5.5%, and cites a 5.8% human benchmark attributed to Belkins. That last figure does not match what the Belkins page currently shows. Either the methodology changed or the citation is stale.

Two further problems with all of it. Every one of these numbers is email, and none of them is LinkedIn, which is the channel we and several of these tools actually compete on. And the AI SDR figures come from a vendor reporting on its own platform. We found no independent, channel-matched, human-versus-AI benchmark. Anyone quoting one to you should be asked for the link.

Buy an AI SDR when your market is big enough that contacting the wrong person costs you nothing, and when the bottleneck is volume rather than quality.

Postelix uses AI for the research and the timing, and holds a human standard on the message itself. The AI decides who to approach and when. It does not get to decide that a generic message is good enough.

The design follows from one assumption: that most of the founders we sell to have a market of maybe two thousand real buyers, where a burned account does not regrow and the buyers talk to each other. In that situation the cost of a bad message is not a low reply rate, it is losing the account permanently.

We are a bad fit more often than our marketing would normally admit. Here are the cases where you should buy something else.