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AI SDR Vendor Due-Diligence Checklist — What to Verify Before You Buy (2026)

August 15, 2026 · 10 min read · by the 0effort team

TL;DR: "AI SDR" covers a wide range of products — some bundle a contact database with sequencing, some price by send volume or seats, some stop at drafting emails instead of handling replies. We haven't independently verified any specific competitor's current pricing, feature scope, or terms, so the questions below are ones to put to whichever vendor you're evaluating rather than answers we can supply about them. 0effort's model: it sources your buyers, writes and sends across email and LinkedIn, answers replies with AI agents over email and phone, and books the meeting, for a flat monthly fee per tier (Launch $99, Growth $349, Scale $999) — not billed by send volume.

Start by pinning down what the vendor is actually selling you

Vendors in this space typically combine some mix of a contact database, AI-generated email copy, and a sequencing engine — sometimes as one bundled product, sometimes as separate add-ons. Before you commit to any vendor, get a straight answer, in writing, on which of those pieces are actually included at your plan tier, and which are upsells.

The reply side is where "AI SDR" claims get the loosest across the category. Ask specifically: how much of reply-handling and escalation is automated beyond drafting the initial send, versus how much still lands on a human running the campaign? Get a live demo of the actual reply flow, not a feature-list checkbox.

Questions worth asking any AI SDR vendor before you buy or renew

If a vendor's plan bundles a contact database with AI-generated copy, put these three questions to them directly:

• Does the bundled database actually cover your segment, or will you end up topping it up elsewhere for a niche vertical or thin market?
• Does the AI-generated copy still read as distinct once a prospect has seen similar phrasing from other vendors using comparable tools?
• If the plan is priced around send volume or database access tier, what happens to your bill as your list grows? Ask for the exact mechanics, not a marketing summary.

A concrete example of a bad answer on that last point: a plan billed per "credit," where a credit is consumed on send rather than on reply. Double your list and you double your credit burn even if reply rates don't move — the bill scales with your ambition, not your results. A flat per-tier fee or a per-meeting-booked fee doesn't have that failure mode; ask which one you're signing up for before your first invoice, not after.

Pricing: what to verify on any vendor's side, and what 0effort actually charges

Pull up the vendor's current pricing page yourself (pricing pages change without notice, so treat what you see there as the source of truth over anything summarized elsewhere) and ask directly: is the plan priced by outcome (meetings, tier of service) or by activity (emails sent, database seats, contact records accessed)? If it's activity-based, get them to walk through what a list twice the size of your current one would cost — in writing, not verbally.

Here's what we can state with certainty, because it's our own product: 0effort's three tiers — Launch at $99/month, Growth at $349/month, and Scale at $999/month — are priced by plan, not by send count, and each tier covers the same full loop: sourcing, writing, sending, reply handling, and booking. If you send more within a tier, the bill doesn't move.

Use this checklist when you get a vendor's numbers, next to 0effort's actual answer for the same question:

Copy generation is table stakes — the real gap is decision-making

Put this to any vendor directly: how far does their AI extend past copy generation and sequencing into lifecycle decisions like segment prioritization, judging reply intent, or when to escalate a hot conversation? Ask for specifics on what's automated versus what still sits with whoever's running the campaign.

0effort is built to take on more of that judgment: it prioritizes sourcing against your approved ICP, and its AI agents classify and respond to incoming replies over email and phone, escalating conversations to a human as needed. The difference between a database-bundling tool and 0effort isn't "smarter AI" — it's how much of the SDR's actual job, beyond drafting emails, each product has been built to own.

What does the day-to-day operator workload look like on a database-bundling tool versus 0effort?

With a sequencing-plus-database tool, someone on your team is still doing list curation when the bundled database comes up short, reviewing AI drafts before they go out, and — the big one — reading every reply to decide what happens next. At around 50 replies a week and 3-5 minutes of triage per reply — reading the message, deciding intent, drafting or approving a response — that's 2.5-4 hours a week just on triage, and it scales with reply volume, not list size, so it climbs as the campaign starts working.

0effort is built to compress that second half of the job. You still approve strategy and check in on escalated conversations, but reply classification, follow-up sequencing, and initial booking attempts run without someone manually working the inbox. The honest caveat: any AI SDR platform, this one included, still needs a human reviewing strategy and handling escalated accounts — "zero operator time" isn't a real claim for a database-bundling tool or for 0effort.

When staying with your current vendor is the right call

Don't switch just because a checklist article told you to. If, after you've verified the specifics above, a bundled database-plus-sequencing product covers what you need — your team is happy owning reply triage and booking themselves, and your costs aren't creeping up each renewal — you don't have an active problem to solve.

What does migrating away from a database-bundling vendor involve?

The mechanical parts are easy: while your account is still active, copy the subject lines and body text of each live sequence into a doc or CSV — don't assume you'll still have export access after cancelling, so do this before, not after. Then pull up the data-ownership or portability clause in the vendor's ToS or DPA (search for "contact ownership" or "data portability") and confirm in writing which contacts sourced through their platform you're licensed to keep working versus which you'll need to re-source or already own independently — don't take a sales rep's verbal answer on this, get the clause. 0effort's own approach on the sourcing side is to find buyers itself by matching against your approved ICP, rather than pulling from a fixed pre-built database; portability of the contacts and activity history in your workspace is governed by 0effort's terms of service — read them yourself rather than taking our word for it here.

The part people skip and regret is domain warm-up. Sending domains build reputation over weeks of consistent volume; stopping sends from one platform and starting cold from another, on the same domains, risks a reputation dip right when you need deliverability most. Bring your existing mailboxes into the new platform rather than standing up fresh ones, and ramp volume back up gradually instead of resuming at your prior send rate on day one. For the mechanics of domain health, see our cold email deliverability checklist — read it before, not after, a migration.

CRM sync is the other piece to verify before you commit: confirm your target platform's HubSpot or Salesforce integration covers the objects and fields your pipeline reporting depends on, not just contact creation.

Which fits your team: a database-bundling vendor or 0effort — a decision table by list source, send volume, and CRM

FAQ

What does a bad data-portability clause in an AI SDR vendor's contract actually look like?

The concrete red flag: a clause that ties contact ownership to an active subscription, so the contacts a vendor sourced for you — not ones you brought in — stop being yours to work the moment you cancel. Watch for wording like "customer may use Platform Data during the Subscription Term" without a separate line granting a license that survives termination. If the ToS or DPA doesn't say explicitly what happens to sourced contacts and activity history after cancellation, that's the question to force a written answer to before you sign, not after. If you're researching the category itself rather than evaluating a specific vendor, our guide to what an AI SDR actually does is the better starting point.

Does 0effort use its own contact sourcing, or do I need to bring a list?

0effort sources buyers itself, matching against your approved ICP, so you're not paying for a separate database subscription to feed it. Whether a database-bundling vendor supports working from a list you already own, and on what terms, varies — ask them directly.

What happens to my sending domains and warm-up if I switch mid-campaign?

Move your existing warmed mailboxes into the new platform rather than creating new ones, and ramp send volume back up gradually rather than resuming at full pace immediately. A sudden platform switch on freshly connected domains is the single most common way teams tank deliverability mid-migration.

Does 0effort integrate with HubSpot/Salesforce?

0effort doesn't currently list a native HubSpot or Salesforce sync on its public pricing or product pages. If CRM sync is a hard requirement, check 0effort's current integration scope directly before committing, and ask any vendor you're evaluating what their integration actually covers (contacts, deals, activity logs vary by platform) — don't assume parity based on this article.

Is there a free trial or pilot before committing to an annual contract?

There's no annual contract to commit to — 0effort bills monthly and you can cancel anytime, per the current pricing page. The "Start free" / "Start test drive" links on this site begin the same 14-day test drive: a card is required upfront, but you're not charged until day 14, and you can cancel in one click before then — that's what "free" means here, not "no card." Growth and Scale plans also carry a meeting guarantee — 3 qualified meetings in your first 45 days, or your next month is free — with the binding conditions in our Terms of Service, §10. Whether a specific competitor offers a trial or pilot, and on what terms, varies — check their current pricing page.

How long until a switched-over campaign produces its first booked meeting?

There's no honest fixed number — it depends on list quality, how warmed your sending domains already are, and how narrow your ICP is. Migrating existing warm domains and a list you already trust will get you to a first reply faster than starting both from scratch. We'd rather say that plainly than print a made-up week count.