CSVgo vs ReachStream: Different Tools, Different Jobs
CSVgo and ReachStream get lumped together, but comparing them is misleading - they solve completely different problems, and that's why teams keep buying the "wrong" one.
Your contact list decays by roughly 28% per year. Once you cross the 5% bounce threshold, deliverability tanks fast. If you exported 10,000 leads from Apollo and half the emails are catch-alls, you don't need a database - you need list cleanup. But if you're starting from zero, a verifier won't magically create prospects.
The 30-Second Verdict
- CSVgo wins if you already have a lead list and need deep cleanup - catch-all handling, ESP detection, segmented exports.
- ReachStream wins if you need to build a prospect list from scratch with filters, enrichment, and a built-in verifier.
What Each Tool Actually Does
CSVgo - List Cleanup Specialist
Use this if your workflow starts with "export a CSV" from Apollo, a form-fill list, event leads, or scraped data, and you need to make it campaign-ready. CSVgo's entire focus is cleanup plus verification: catch-all verification, invalid removal, and ESP detection across Gmail, Outlook, and SMTP providers so you can segment sends and protect your domain. It also supports campaign-ready segmented exports with multiple formats - All Valid, Valid (No Outlook), No Emails, and All Results.
Skip this if you're expecting it to find contacts. CSVgo is built for cleaning and verifying lists you already have, and it offers an API for verification workflows. Here's the thing: CSVgo doesn't publish pricing publicly, which makes procurement and budgeting harder than they need to be.
One cold email stack post on Reddit claims CSVgo "replaces 4 tools" and finds about 30% more valid leads than other verifiers.
ReachStream - B2B Contact Database
Use this if you need a database first. ReachStream covers 200M+ prospects across 150+ countries, with filtering, enrichment, and exporting. It's a classic "build lists, then push to your outbound stack" product. Lead411 lists it among the 7 Best B2B Data Providers for 2026, and ReachStream markets 95% data accuracy alongside a built-in verifier with a 90% email deliverability target.
Skip this if your main pain is list hygiene at scale. ReachStream includes verification, but CSVgo is purpose-built around cleanup workflows like segmentation and aggressive filtering for risky addresses.
Reviews are strong: 4.8/5 on G2 (52 reviews) and 5.0/5 on Capterra (6 reviews). Capterra reviewers highlight 20+ contact insights per profile, though one reviewer notes they needed to export to XLS for their CRM/automation workflow. The consistent knocks on G2 are integration hiccups, occasional verification issues with missing emails, and slow loading - exactly the friction that shows up when a tool tries to be both data and workflow.
You shouldn't need a database tool AND a verification tool AND CSV exports to glue them together. Prospeo gives you 300M+ profiles with 5-step verification - including catch-all handling and spam-trap removal - at 98% email accuracy. One platform, no stitching.
Replace two tools with one and book 35% more meetings.
Features & Pricing
ReachStream publishes pricing; CSVgo doesn't. That's common in cold email tooling, but it's still a tradeoff for buyers who want to compare costs quickly.
Since CSVgo's pricing isn't public, the best proxy is market benchmarks. At volume, email verification typically lands around $0.003-$0.008 per email, consistent with cost-per-100k comparisons across common verifiers (see email verification benchmarks).
| Feature | CSVgo | ReachStream |
|---|---|---|
| Category | List cleanup tool | B2B database |
| Database size | N/A (BYO list) | 200M+ profiles |
| Email verification | Deep (catch-all + ESP detection) | Built-in; 90% deliverability target |
| Pricing | ~$0.003-$0.008/email | Free-$99/mo (4 tiers) |
| G2 rating | No profile | 4.8/5 (52 reviews) |
| Free tier | Unknown | Yes - 200 email views, 100 export credits |
| CRM integrations | None listed | HubSpot, Salesforce |
| Compliance | Not stated | GDPR, CCPA, CAN-SPAM |
ReachStream tiers (monthly / annual): Icebreaker $0, Glacier $39 ($29), Ice Floe $59 ($49), Polar Peak $99 ($79).
When to Use Which
You already have leads - go CSVgo. Export from Apollo or another source, run cleanup, segment by ESP, then push only "safe" addresses into your sequencer. We've seen teams cut bounce rates dramatically just by separating Outlook-heavy segments and slowing send volume on those (more on email bounce rate and email deliverability).
You need leads - go ReachStream. Start with filters, build an ICP list, enrich, then export. For multi-country prospecting, ReachStream's 150+ country coverage is the selling point (use an Ideal Customer Profile template and sales prospecting techniques to tighten targeting).
They also pair fine: source in ReachStream, clean in CSVgo. We've watched teams do this when scaling outbound and they can't afford a deliverability hit from borderline emails (especially if you’re pushing email velocity limits).
Hot take: If your average deal size sits below $10k and your list is under 5,000 contacts, you probably don't need two separate tools at all. The overhead of managing a database subscription plus a verification tool plus stitching exports between them costs more in time than it saves in money. Get one platform that handles both.
A Simpler Option for Most Teams
It's credit-based and self-serve at roughly $0.01 per email. Teams using it book 26% more meetings than with ZoomInfo and 35% more than with Apollo using the same outbound workflows. Native integrations with Salesforce, HubSpot, Smartlead, Instantly, and Lemlist mean you skip the CSV shuffle entirely (see more outbound lead generation tools and SDR tools).
ReachStream targets 90% deliverability. CSVgo doesn't publish accuracy stats. Prospeo delivers 98% email accuracy on a 7-day data refresh cycle - 6x faster than the industry average. At ~$0.01/email with no contracts, your list stays clean without the multi-tool tax.
Stop bouncing emails. Start closing deals.
FAQ
What's the main difference between CSVgo and ReachStream?
CSVgo is a list cleanup tool - you bring your own CSV and it verifies, segments, and removes bad addresses. ReachStream is a B2B contact database where you build prospect lists from scratch with 200M+ profiles across 150+ countries. They sit at completely different stages of the outbound workflow.
Can I use CSVgo and ReachStream together?
Yes. Export contacts from ReachStream, then run them through CSVgo for deeper verification like catch-all handling and ESP detection. This pairing makes sense when you want maximum list hygiene before high-volume sends.
Does ReachStream replace a dedicated email verifier?
Not entirely. ReachStream's built-in verifier targets 90% email deliverability, which is solid for a database product. But dedicated cleanup tools like CSVgo focus on segmentation, provider detection, and stricter filtering - which matters at high-volume cold email scale where even 5% bounces hurt your domain.
Is there a single tool that replaces both?
Prospeo combines a 300M+ contact database with 5-step email verification (including catch-all handling) in one platform. At $0.01 per email with 98% accuracy and a 7-day data refresh cycle, it eliminates the need to stitch a separate database and verifier together.