BlitzAPI vs Invoice Guru

Side-by-side comparison to help you choose the right AI tool.

BlitzAPI is your cheat code for clean B2B data that supercharges your GTM playbooks.

Last updated: February 28, 2026

Invoice Guru lets you whip up HMRC-compliant invoices in 60 seconds, so you can focus on the job, not the paperwork.

Last updated: February 28, 2026

Visual Comparison

BlitzAPI

BlitzAPI screenshot

Invoice Guru

Invoice Guru screenshot

Feature Comparison

BlitzAPI

This isn't your grandma's search engine. BlitzAPI's algorithm doesn't just find people; it ranks and prioritizes them based on your ideal customer profile. You get the decision-makers you actually want, instantly, without sifting through a mountain of irrelevant noise. It's like having a targeting system for your prospecting.

Verified Email & Phone Enrichment

Stop sending emails into the void. BlitzAPI hooks you up with verified, accurate work emails and direct phone numbers. The magic is in the verification—it's built with a deliverability-first mindset, meaning the data actually works when you use it. No more bounces, just connects.

Catch-All Email Validation (The Game Changer)

Catch-all domains (like @company.com) are the final boss of email validation, and BlitzAPI beats it with >98% accuracy. It validates these in real-time, so you never have to guess if an email is real or just a black hole for your credits. This feature alone saves budgets and sanity.

Unlimited Data Enrichment API

Enrich everything, at scale, with simple API calls. Feed it a name and company, and get back a full profile: enriched emails, phone numbers, LinkedIn URLs, and company data. It's the single, powerful endpoint to make your existing lead lists instantly more valuable and actionable.

Invoice Guru

Instant Invoice Creation

Create and send a professional invoice in less than a minute. Just enter your client's details and items, and Invoice Guru handles the rest, automatically adding your logo, VAT, payment terms, and due dates. It's invoicing on-the-go made easy!

Automatic Invoice Numbering

Forget about manually numbering your invoices. Invoice Guru automatically numbers and dates each invoice according to your fiscal year settings, ensuring you stay organized and compliant without lifting a finger.

OCR Receipt Scanner (AI)

Snap a photo of your receipt and let our AI do the heavy lifting. The OCR scanner reads all the details, saving them as expense entries without any manual data entry. Say goodbye to tedious paperwork and hello to efficiency.

Smart Payment Tracking

Wave goodbye to the stress of unpaid invoices. Invoice Guru automatically matches incoming bank transactions with your unpaid invoices, giving you real-time updates on who has paid and who is overdue, so you can chase down payments like a pro.

Use Cases

BlitzAPI

Building Automated Outbound Sequences

Power up your cold email or call campaigns with clean data from the start. Integrate BlitzAPI into your CRM or sales automation platform to automatically enrich leads as they come in, ensuring your sequences fire off to verified contacts only. Higher deliverability = more replies, period.

RevOps Workflow Automation

For the Revenue Operations wizards building scalable systems. Use BlitzAPI's APIs to create seamless, automated data enrichment pipelines. Keep your Salesforce, HubSpot, or other systems flooded with accurate contact and company data without manual work, making the entire revenue team more efficient.

Lead List Building & Prospecting

GTM agencies and SDR teams, this is your jam. Rapidly build targeted prospect lists for new campaigns or markets. Use the Smart ICP search to find your ideal personas, then enrich them with emails and phones in one go. Build quality lists faster than you can say "ramp up."

Waterfall ICP Prioritization

This is a pro move. Structure your searches to prioritize by seniority, role, or other signals. The system fetches the top-tier matches first, and you can stop once you've hit your target number. It's the ultimate efficiency hack, ensuring you only spend credits on the absolute best leads for your campaign.

Invoice Guru

For Freelancers

Freelancers can create and send invoices quickly right after finishing a gig. With Invoice Guru, there's no need to wait until you get home; just whip out your phone and get paid faster.

For Tradespeople

Whether you're a plumber, electrician, or carpenter, Invoice Guru helps you generate professional invoices on-site. Capture job details and payment terms instantly, allowing you to focus on the work rather than admin.

For Small Business Owners

Small business owners can simplify their invoicing process, manage clients, and track payments all in one app. No more juggling spreadsheets; Invoice Guru keeps everything organized and accessible from anywhere.

For Accountants

Accountants can benefit from Invoice Guru's automatic report features, making it easy to provide clients with organized summaries of invoices, expenses, and receipts. Save time and keep your clients happier with less hassle.

Overview

About BlitzAPI

Alright, let's break it down. BlitzAPI is basically the secret weapon for GTM (Go-To-Market) teams who are tired of playing whack-a-mole with bad data. Think of it as your on-demand, API-powered data dealer, but for the good stuff—clean, verified B2B intel. It's built for the squads in the trenches: Growth, RevOps, SalesOps, and outbound agencies who need to build automated, scalable playbooks without the usual headache. The whole vibe is "quality over noise." Instead of drowning you in a million useless leads, BlitzAPI's algorithms help you find and prioritize your actual Ideal Customer Profile (ICP) with scary accuracy. Need to find a decision-maker, verify their work email (even the tricky catch-all ones), or snag a direct dial? It's all there, delivered via simple APIs that plug right into your existing workflow. No more adapting your whole process to some clunky tool. BlitzAPI fits in, gives you what you need, and gets out of the way so you can actually hit your numbers. It's the infrastructure for your GTM engine, designed to scale with you and priced so you only pay for verified results, not garbage data.

About Invoice Guru

Invoice Guru is your go-to invoicing sidekick, specifically designed for the real MVPs of the working world: tradespeople, freelancers, and small business owners who hustle hard every day. No more wrestling with clunky desktop software that was clearly made for office drones. This mobile-first app allows you to whip up a professional invoice from your phone in under 60 seconds, all while you're still on the job site. It's all about slashing admin time so you can focus on what you do best. Built by someone who knows the grind, Invoice Guru automates the tedious tasks like tracking payments, scanning receipts with AI, and matching bank transactions, so you always know who's paid and who's not. And with its forward-thinking design, it's already gearing up for compliance measures like UK MTD, ensuring you won't need to make a last-minute software switch. Think of Invoice Guru as your digital tool belt, making it easier than ever to get paid faster and smarter.

Frequently Asked Questions

BlitzAPI FAQ

What makes BlitzAPI different from other data providers?

Most data vendors sell you bulk, unverified lists full of outdated info. BlitzAPI flips the script. We're API-first, built to integrate into your workflow. We prioritize quality and deliverability, so you only pay for verified, accurate results (not noise). Plus, our catch-all validation is next-level.

How does the "pay for verified results" model work?

Simple. You get credits. You only use a credit when we successfully return a verified piece of data you request (like a validated email or phone). If we can't find it or verify it, you don't get charged. No more wasting money on empty searches or bad data. It's fair and scalable.

Is it easy to integrate BlitzAPI into our existing tech stack?

Absolutely. We're built by devs for modern GTM stacks. Our APIs are clean, well-documented, and designed for easy integration into CRMs (like Salesforce), marketing automation tools, data warehouses, and custom apps. You shouldn't need an engineering PhD to get it running.

What kind of data coverage and accuracy do you have?

We're packing serious heat: over 360 million verified B2B contacts and 60 million enriched company profiles. Our email deliverability rate is over 98%, thanks to real-time validation tech that even tackles catch-all domains. We focus on major markets to keep our data fresh and reliable.

Invoice Guru FAQ

How does Invoice Guru ensure compliance with HMRC?

Invoice Guru is designed to be HMRC compliant, automatically updating to meet any new regulations. This means you can focus on your business without worrying about falling afoul of tax laws.

Can I use Invoice Guru on my mobile device?

Absolutely! Invoice Guru is a mobile-first app, allowing you to create, send, and track invoices right from your phone. It's perfect for those who are always on the go.

What happens if I exceed my invoice limit on the free plan?

If you hit the limit of 10 invoices on the free plan, you can upgrade to one of the paid plans for unlimited invoices and additional features. This way, you can keep your business running smoothly.

Is there customer support available?

Yes, Invoice Guru offers customer support to help you with any questions or issues you may encounter. Whether you need help setting up or troubleshooting, assistance is just a click away.

Alternatives

BlitzAPI Alternatives

So you're scoping out the B2B data API scene and you've heard about BlitzAPI. It's basically that go-to toolkit for growth teams who need to level up their prospecting game with clean, verified contact and company intel. It's all about feeding your outbound and sales ops with quality data, not just a massive pile of junk leads. People hunt for alternatives for all the usual reasons. Maybe the pricing feels a bit steep for your current hustle, or you need a super niche feature they don't have. Sometimes it's just about platform fit—your tech stack is built different and needs a specific kind of integration vibe. It's totally normal to shop around. When you're comparing options, keep your eyes on the prize. Don't just get dazzled by a huge database number. Dig into data accuracy and how they verify their info. Check how smoothly it plugs into your existing workflow—you want a sidekick, not a whole new job. And always, always peep their reputation for deliverability. Sending emails to dead inboxes is a major L.

Invoice Guru Alternatives

Invoice Guru is your go-to mobile app for whipping up HMRC-compliant invoices in mere seconds, designed especially for tradespeople, freelancers, and small business owners. It's all about cutting the corporate fluff and making invoicing a breeze, right from your phone. Users often seek alternatives to Invoice Guru for a variety of reasons: maybe they're hunting for features that fit their specific workflow, looking for budget-friendly pricing, or needing compatibility with other platforms. When searching for the perfect alternative, it's crucial to consider ease of use, automation capabilities, and whether it meets compliance standards—because nobody wants to deal with last-minute software headaches. Finding an invoicing solution that truly gets you can be a game-changer. Look for options that streamline your workflow, provide solid customer support, and have positive user reviews. It's all about making sure you can create, track, and manage invoices without the hassle so you can focus on what you do best.

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