Stop Sequences from Bouncing. Enrich Before You Load.
Outreach sends to whatever you load. Cleanlist AI verifies each email and fills in missing fields before a contact goes into a sequence.
A demo of Clu. Asked: Find Heads or Directors of Sales Development who are hiring, with outbound in their headline, at IT services firms with 201-1K staff and $50M-$250M revenue in the US. Skip Salesforce customers and open opps. Load the qualified ones into Outreach. Clu searches, adds the top 25 people to Outreach Q4 load, asks for approval before spending credits, finds verified emails and phone numbers through the waterfall, scores every lead against the ICP and sends the 11 qualified leads to Series B outbound in Outreach, which does the sending.
10,000+ users, from founders to full sales teams
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The short answer
Enrich and verify the list before it goes into Outreach. Outreach runs your sequences but doesn't check the contacts you load, so bad addresses bounce and hurt your domain. Cleanlist AI runs each contact through 25+ providers, checks every email for syntax, domain and mailbox, and flags the risky ones. Push the clean list to Outreach directly or import it as a CSV.
Outreach.io Users: what gets in the way.
Outreach will send to a bad address as readily as a good one, and your domain pays for it.
- 01
Outreach doesn't verify contacts
Outreach sends to every contact you import. If part of the list is bad, it sends to those addresses anyway, and the bounces count against your domain in every sequence.
- 02
Bounces follow your domain
Mailbox providers track bounces by sending domain. Once yours climbs, they throttle every email you send, good addresses included, and recovery can take weeks.
- 03
CRM data is old by the time it's sequenced
A contact pulled from your CRM may have been enriched months ago. People change jobs and email addresses in the meantime, so the data can be stale by the time the sequence starts.
- 04
No enrichment inside Outreach
Outreach is a sequencing engine. It doesn't enrich contacts, verify emails or find phone numbers, so that work has to happen before the import.
Cleanlist AI validating outreach-prospects-export.csv. Each address is marked Verified, Likely valid, Risky, Invalid or Unknown. Of 4,200 rows, 3,620 Verified, 240 Likely valid, 188 Risky, 131 Invalid, 21 Unknown.
How Cleanlist AI fits.
Cleanlist AI sits before the import: it verifies the emails and adds the phone numbers your call steps need.
- 01
Every email checked before import
Cleanlist AI checks each email's syntax, domain and live mailbox before it reaches Outreach. Invalid, disposable, catch-all and risky addresses get flagged so you can leave them out.
- 02
Fill the gaps before you load
Run the list through the 25+ provider waterfall first. It fills missing fields, updates stale records and adds phone numbers.
- 03
Upload the sequence list as a CSV
Cleanlist AI enriches and verifies every row, flags the risky emails and hands back a file ready to import, or pushes the list to Outreach for you.
- 04
Phone numbers for the call steps
A call step in Outreach needs a number to call. On our 500-lead benchmark, Cleanlist AI's waterfall found a phone number for 85% of leads.
- Verified work emails25 leads searched23 × 123
- Phone numbersVerified before anyone calls18 × 10180
- Qualification agentFit score with reasons25 × 5125
How the alternatives compare.
All three can feed Outreach. They differ on contracts and on where their data runs thin.
| Option | Where it fits | Where it stops |
|---|---|---|
| Apollo Compare | Prospecting with sequences built in, which can replace Outreach for some teams | One database, per-seat pricing, and Apollo data reaches Outreach only through a manual export and import |
| ZoomInfo Compare | Connects to Outreach, with a large contact database and intent data | $15K+ a year on annual per-seat contracts, and accuracy limited to its own database |
| Cognism Compare | Phone-verified mobile data that it can push straight into Outreach | Annual per-seat contracts; strongest in Europe, with thinner US phone coverage outside enterprise contacts |
How do I use Cleanlist AI with Outreach.io?
Export the contact list or CRM segment as a CSV and upload it to Cleanlist AI. Cleanlist AI enriches and verifies it, then you import the clean file into Outreach or push it there directly. Each contact arrives with a verified email, a phone number where one was found and company data. Run it before every new sequence.
Will Cleanlist AI reduce my Outreach bounce rate?
Yes, by keeping bad addresses out of your sequences. Every email is checked at the syntax level, the domain level (MX records, mail server response) and the mailbox level (does this inbox exist and accept mail). Anything that fails is flagged so you don't load it into Outreach.
How often should I re-verify contacts in my Outreach sequences?
Re-verify any list older than 90 days before it goes back into a sequence. People change jobs and addresses between campaigns, and a quick verification batch prevents a bounce spike.
Can Cleanlist AI add phone numbers for Outreach call steps?
Yes. The waterfall checks 25+ providers and found a phone number for 85% of leads on our 500-lead benchmark. Map the phone column to Outreach's phone field and the numbers show up in your call steps.
Is Cleanlist AI cheaper than ZoomInfo for Outreach data enrichment?
Yes, by a wide margin. Cleanlist AI starts at $49 a seat a month for 750 credits, with no annual contract. ZoomInfo starts at $15K a year on annual per-seat contracts. If what you need is verified contacts for Outreach sequences, Cleanlist AI covers it for a fraction of the cost.
Agents that run your GTM.
Verify your next Outreach list on the 14-day Pro trial before it sends. 250 credits, no card.
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