Hashtaag is a leading Custom Software Development, design, and development firm. It works with companies to convert their sales through consultation, development, and deployment of the enterprise. Reach out to us at: hello@hashtaag.com. Hashtaag is a leading Custom Software Development, design, and development firm. It works with companies to convert their sales through consultation, development, and deployment of the enterprise. Reach out to us at: hello@hashtaag.com.