
Lightning-fast keyboard-driven email workflow with robust AI features, but operates as a premium paid-only subscription.
Lightning-fast keyboard-driven email workflow with robust AI features, but operates as a premium paid-only subscription.
BlueMail records 319,805 monthly visits with -5.8% month-over-month growth and Free pricing. Harold records 80 monthly visits with 0% growth and Free Trial, Paid pricing.

Clean, validated invoice data for any ERP
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | bluemail.me | useharold.com |
| Pricing Model | Free | Free Trial, Paid |
| Monthly Visits | 319.81K (319,805) | 80 (80) |
| MoM Traffic Delta | -19.7K (-5.8%) | +80 (0%) |
| Primary Market & Share | 🇺🇸 United States (13.6%) | 🇹🇷 Türkiye (100%) |
| Direct Visits / mo | 115.39K | 31 |
| User Rating | 4.3 | 4 |
| Supported Platforms | Website | Website |

A privacy-first email client with built-in AI writing help
Pull Gmail, Outlook, Exchange, IMAP and POP accounts into one organized view so every message is in a single place.
Summarize long threads, draft replies in your voice, rewrite for tone or length and translate messages without leaving the inbox.
PGP and S/MIME support with keys you generate or bring yourself, plus tracker blocking and a zero-knowledge privacy stance.
Automatic grouping keeps noise down, while the Later board lets you park messages and pick them up when they are relevant.

Clean, validated invoice data for any ERP
AI pulls headers, totals, line items and references from invoices, receipts, purchase orders and statements into structured data.
IF checks, formulas and conditional logic catch wrong totals, missing fields and bad supplier IDs, or transform data on the fly.
Map any supplier alias on a document to your internal supplier ID once, and Harold applies it automatically from then on.
Shape exports to match your ERP, finance team or Zapier flow with CSV, Excel, JSON and webhook output templates.

Lightning-fast keyboard-driven email workflow with robust AI features, but operates as a premium paid-only subscription.
Lightning-fast keyboard-driven email workflow with robust AI features, but operates as a premium paid-only subscription.

Outstanding team collaboration and shared inbox management, but less focused on individual consumer privacy features than BlueMail.
Outstanding team collaboration and shared inbox management, but less focused on individual consumer privacy features than BlueMail.

Familiar multi-account interface with built-in AI writing tools, but less automated email categorization than BlueMail.
Familiar multi-account interface with built-in AI writing tools, but less automated email categorization than BlueMail.

SpecialistFull autonomous executive assistant for email triaging and scheduling, but significantly more expensive than standard email clients.
SpecialistFull autonomous executive assistant for email triaging and scheduling, but significantly more expensive than standard email clients.

AI agents that run document-heavy business processes end to end

Exceptionally fast AI email triage and auto-summarization, but requires using Shortwave's specific client interface instead of your own.
Exceptionally fast AI email triage and auto-summarization, but requires using Shortwave's specific client interface instead of your own.

Transforms messy email threads into clean chat bubbles, but changes traditional email layout significantly.
Transforms messy email threads into clean chat bubbles, but changes traditional email layout significantly.

Free / Open-sourceOpen-source and self-hostable with great cold email blocking, but requires technical setup compared to turnkey apps.
Free / Open-sourceOpen-source and self-hostable with great cold email blocking, but requires technical setup compared to turnkey apps.

Bank statement converter that checks its own work
Bank statement converter that checks its own work

SpecialistIntegrates directly into existing Outlook or Gmail clients via extension, but lacks a dedicated native email app UI.
SpecialistIntegrates directly into existing Outlook or Gmail clients via extension, but lacks a dedicated native email app UI.

Turn invoices into Excel with AI that flags what you should double-check
Turn invoices into Excel with AI that flags what you should double-check

AI-powered data extraction from invoices, IDs, receipts and any business document
AI-powered data extraction from invoices, IDs, receipts and any business document