What are the options for sending handwritten cards out to clients?

Some options for software for sending out physical birthday, congratulations, Christmas and other greeting cards to clients:

Automatic printed cards

• SendOutCards – starts at $2.75 per card, add an extra $1 or $2 for building your own card and for photo drop cards
• Sincerely Ink – starts at $3 for international cards send to clients for special occasions
• Postable – starts at $5.70 for international cards and has option for automated cards to your clients. Import your client list or set triggers for when they’re sent.
• Lob – starts at $0.69 per letter with a minimum spend of $260 per month.
• ClickSend – starts at $1 per letter with options to also send via SMS, MMS, Voice, Email, Fax and rich messaging.

Automatic handwriting-generated cards

• Handwrytten – starts at $3.00 per card with the average being $3.50 per card, connects to other apps via Zapier, including Smartsheet, Keap, Follow Up Boss, Google Sheets, ActiveCampaign, Zoho, Shopify, Amazon Seller Central and others.
• ⭐ Thanks – starts at $0.59 per send! features 12 proprietary handwriting styles for your cards and postcards.
• Felt App – starts at $4 with an extra $1 for international shipping outside the US. Uses your own handwriting on the card to your clients. Also offers Plus & Pro subscriptions for further savings. Available on iOS and Android app.
• Cardly – prices from $2.25 per card, Cardly ships to 50+ countries and lets you send handwritten cards, letters and postcards as easily as sending email. Ability to use custom artwork, your own handwriting, signatures and messages from multiple people. Fully-featured API and Zapier integrations.
• Mailchimp – starts at around $1.50 per postcard to send international business postcards. Can be used for client cards, announcement cards, loyal customer offer cards, abandoned cart postcards or just to say thanks.
• Click2Mail – starts at $2.50 and integrates with Zapier to send notes, letters, postcards from Google Sheets and hundreds of other apps.
• ZenDirect – starts at $1.20 per mailer and integrates with Zapier to send mail from HubSpot, Infusionsoft, Marketo, Sharpspring. Also includes options for letters, gifts, giftcards etc

Real, handwritten cards by humans

• Punkpost – starts at $5 per card. Designed by artists and can include confetti bombs, sent anonymously or can include photo squares
• Thankbot – pricing starts at $4.75 per business thank you note and are all genuinely handwritten
• With Thanks – POA. Used for sending handwritten business thank you cards
• Thankster – pricing starts at $2.31 per card and their software can be set up to integrate with Zapier, Infusionsoft, Shopify, Eventbrite, Marketo, Google Sheets, Zenkit, Vero, Ontraport, Nationbuilder and Sharpspring to trigger automatically delivered business note cards.