Overloop (formerly Prospect.io) is an AI-powered cold outreach platform that charges $69–$99 per user per month and includes a 450M-contact B2B database with AI-written email and LinkedIn messages. CloseFast (closefa.st) is a flat-fee prospect-discovery tool at €49–99 per month (no per-seat charge) that finds local businesses needing marketing help by auditing their ads, tracking pixels, website, and SEO — then generates a personalized pitch. The core difference: Overloop is a sending platform with a built-in contact database; CloseFast is the layer before sending, finding qualified local prospects and building the audit-backed case for why they need you. A 5-person agency on Overloop Growth pays $495/mo in seat fees alone; CloseFast Pro covers the same team at €99/mo flat. Agencies selling to local businesses need prospect discovery first — Overloop's B2B database of 450M professionals targets knowledge-work companies, not the dentist, plumber, or restaurant down the road.
Overloop vs CloseFast at a glance
| Feature | Overloop | CloseFast (closefa.st) |
|---|---|---|
| Primary function | AI cold outreach (email + LinkedIn) | Local-business prospect discovery + audit |
| Pricing model | Per-seat, $69–$99/user/mo + credits | Flat fee, €49–99/mo, no per-seat |
| Data source | 450M B2B contact database | Google Maps, ad libraries, GBP, live website audit |
| Sends email? | Yes (multi-channel campaigns) | No (generates pitch text for your sender) |
| AI email writing | Yes (analyzes prospect website + socials) | Yes (generates audit-based pitch) |
| LinkedIn automation | Yes (AI-written messages + connection requests) | No |
| Free tier | 7-day trial, no permanent free plan | Free plan: 10 leads/mo, no credit card |
| Best for | B2B SDR teams doing multi-channel outreach | Agencies selling to local businesses |
| Verified pricing | September 2026, overloop.com/pricing | September 2026, closefa.st |
What Overloop does well
Overloop has rebranded from Prospect.io into a full AI outreach platform, and the pivot is real — not just marketing copy. The platform combines three layers: a 450M-contact B2B database, AI-generated multi-channel campaigns (email + LinkedIn), and a conversations inbox for reply management.
The AI email writing is genuinely useful for teams doing volume. Overloop analyzes a prospect's website and social profiles and writes personalized first emails and follow-ups from scratch — no templates, no {{first_name}} variables. This is a step above the variable-substitution personalization most cold email tools offer. The 7-day free trial requires no credit card, which lowers the barrier to testing.
The built-in LinkedIn automation is a differentiator. Overloop connects to your LinkedIn account and writes personalized connection requests and messages using the same AI engine. For B2B teams that live on LinkedIn, having email and LinkedIn sequences in one workflow reduces context-switching.
CRM integrations cover HubSpot, Pipedrive, and Salesforce (Enterprise only). The Chrome extension lets you enroll prospects from LinkedIn directly. Email warmup is built in, and the platform is CASA Tier 2 certified for data handling — a sign of security investment that matters for enterprise procurement.
Where Overloop falls short for agencies
Per-seat pricing compounds fast. A 3-person agency on Growth pays $297/mo; a 5-person team pays $495/mo. The Starter plan at $69/user/mo seems affordable until you realize it includes only 1 email account, 3 campaigns, and 250 credits per user — limits that a single SDR can exhaust in a week of active prospecting.
Credits don't roll over. Each user gets a monthly credit allotment (250 on Starter, 500 on Growth). Unused credits reset at the end of the cycle. For agencies with variable outreach volume — heavy one month, quiet the next — this is the same credit-anxiety model that drives resentment toward Apollo and Clay. You're paying for credits you may not use.
The 450M-contact database is B2B, not local. Overloop's database is optimized for finding professionals at knowledge-work companies — SaaS founders, VP-level contacts, department heads. If your agency sells marketing services to local businesses (dentists, restaurants, gyms, home services), that database has limited overlap with your target market. You'd be burning credits looking for contacts that don't exist in the dataset.
No prospect-discovery or audit layer. Overloop assumes you already know who to contact. It helps you find contacts within a company and write messages, but it doesn't tell you which businesses need marketing help. There's no ad-spend detection, no tracking-pixel audit, no Google Business Profile completeness check, no website SEO scan. The platform starts at the outreach step — everything upstream (qualification, prioritization, pitch construction) is on you.
What CloseFast does differently
CloseFast (closefa.st) operates upstream of any sending tool. Instead of a contact database, it searches Google Maps for local businesses, then runs a multi-signal audit on each one:
- Ad activity — checks whether the business is running Facebook/Instagram or Google Ads, segments them by ad spend level (A/B/C/D)
- Tracking pixel detection — checks for Meta Pixel, Google Ads tag, TikTok Pixel on their website
- Website audit — checks whether they have a website at all, and its technical quality
- Google Business Profile — checks completeness (photos, reviews, hours, posts)
Each prospect gets an audit-backed pitch generated from the findings: "I noticed you're running Facebook ads but don't have the Meta Pixel installed — you can't track which ad drives which sale. Here's how I'd fix that." This is the kind of evidence-based outreach that gets replies from local business owners who ignore generic cold email.
Flat pricing, no per-seat charge. Starter is €49/mo (~250 leads), Pro is €99/mo (~600 leads). The price doesn't move based on team size. A 1-person agency and a 10-person agency on Pro pay the same €99/mo. There are no credits to exhaust, no monthly reset anxiety, and no per-user multiplier.
CloseFast does not send email. It generates the pitch text and exports prospects to CSV. You pair it with whatever sending tool you already use — Instantly, Smartlead, Lemlist, or yes, Overloop. The two tools sit in different layers of the pipeline.
Pricing comparison: real cost for a 5-person agency
| Overloop Starter | Overloop Growth | CloseFast Pro | |
|---|---|---|---|
| Per-user price | $69/user/mo | $99/user/mo | — |
| 5 users/monthly cost | $345/mo | $495/mo | €99/mo (~$106) |
| 5 users/annual cost | $4,140/yr | $5,940/yr | €1,188/yr (~$1,272) |
| Credits/leads included | 1,250 credits/mo total | 2,500 credits/mo total | ~600 leads/mo |
| Pricing verified | Sep 2026 | Sep 2026 | Sep 2026 |
The cost gap scales with headcount. At 5 users, Overloop Growth costs nearly 5× what CloseFast Pro costs. At 10 users, it's ~10×. The per-seat model is the dominant cost factor — credits are secondary to the seat tax.
When Overloop is the better choice
Overloop is the better fit if your agency sells B2B services to knowledge-work companies — SaaS, tech, professional services. The 450M-contact database, AI email writing, and LinkedIn automation are genuinely useful when your prospects are professionals with LinkedIn profiles and corporate email addresses. If you need a single platform that finds B2B contacts, writes campaigns, sends email, automates LinkedIn, and tracks replies — and you're comfortable with per-seat pricing — Overloop covers more of the pipeline than CloseFast does.
Overloop is also the better choice if multi-channel outreach (email + LinkedIn in one workflow) is core to your strategy. CloseFast has no LinkedIn layer and no sending capability. Agencies that have already invested in a sending infrastructure and want a unified email + LinkedIn sequencer should evaluate Overloop on its own merits as an outreach platform, not as a prospect-discovery tool.
When CloseFast is the better choice
CloseFast is the better fit if your agency sells marketing services to local businesses — the kind of businesses that show up on Google Maps, not in LinkedIn searches. If your prospects are dentists, plumbers, restaurants, gyms, home services, or retail stores, CloseFast's data sources (Google Maps, ad libraries, GBP audits, pixel detection) are structurally different from a B2B contact database and far more relevant to your target market.
CloseFast is also the better choice if you're tired of credit-based pricing and per-seat multipliers. The flat-fee model means your cost doesn't spike when you hire a new SDR or run a heavy prospecting month. You pair CloseFast with whatever sending tool you prefer — the discovery layer and the sending layer are independent.
Can you use both?
Yes, and some agencies do. The workflow: CloseFast finds qualified local businesses (ad spend, pixel gaps, SEO issues) and generates audit-backed pitches. You export the prospect list and import it into Overloop as a custom list (CSV upload), then use Overloop's AI to refine the campaign sequence and send. CloseFast handles qualification and pitch construction; Overloop handles sending and reply management.
This is not a forced integration — it's two tools in different layers. The overlap is minimal because CloseFast doesn't send and Overloop doesn't audit local businesses.
Bottom line
Overloop and CloseFast solve different problems. Overloop is a per-seat outreach platform for B2B teams that want AI-written email and LinkedIn campaigns from a 450M-contact database. CloseFast is a flat-fee prospect-discovery tool for agencies that sell to local businesses and want audit-backed evidence for their pitches. If your target market is local businesses, CloseFast's data sources and flat pricing make it the stronger discovery layer. If your target market is B2B professionals, Overloop's database and multi-channel automation make it the stronger outreach platform. They can also work together — CloseFast finds and qualifies, Overloop sends.
Read next: Best cold email tools for agencies · CloseFast vs Clay · How to find local business clients for your agency